2802 results about "Primary station" patented technology

A lighting control system network and method of providing same including a remote control unit having a RF signal transmitter and a RF receiver and a number of lighting control units, each of the lighting control units having a RF signal transmitter, a RF receiver, and a lighting unit associated therewith. The remote control unit and the lighting control units are configured in a master-slave oriented network. One of the lighting control units is configured as a master in the network and the remaining lighting control units and the remote control unit are configured as slaves in the network. The lighting control units and the remote control units communicate bi-directionally with each other over RF wireless links. The network may include sensors for detecting an environmental or system parameter. Multiple instances of the lighting control network may be interfaced together to form a building-wide network.

A robotic system that includes a mobile robot linked to a plurality of remote stations. The robot provides both audio and visual information to the stations. One of the remote stations, a primary station, may control the robot while receiving and providing audio and visual information with the remote controlled robot. The other stations, the secondary stations, may also receive the audio and visual information transmitted between the robot and the primary station. This allows operators of the secondary stations to observe, communicate and be trained through the robot and primary station. Such an approach may reduce the amount of travel required to train personnel.

A method for operating a personal ad-hoc network (PAN) among a plurality of Bluetooth devices is provided. The method for operating a PAN among a plurality of Bluetooth devices includes the steps of: (a) performing an inquiry in a Bluetooth device, checking whether other Bluetooth devices are present in the communicable range of the Bluetooth device, and determining the presence of a response to the inquiry; (b) as the PAN's master, storing PAN's slave information and sending it to other slaves when a request for establishment of a connection occurs after repeating inquiry and page scans if there is no response to the inquiry in step (a); and (c) establishing a connection and then changing into a slave role if there is a response to the inquiry in step (b) from a network master, and then receiving PAN information from the network master.

A game device is provided which can connect to a plurality of wireless controllers. A game device of the present invention has a plurality of communication modules, each serving as a master, which can wirelessly connect to slaves. One communication module performs an inquiry procedure for establishing a connection with a plurality of slaves, and the other communication module performs no inquiry procedure. The communication module that has issued the inquiry transmits, to a control unit, information relating to a slave that is not connected to the module itself, and the other communication module acquires the information from the control unit, thus obtaining information necessary for establishing a connection with a slave. This allows for quickly establishing a connection with a slave.

Gateway load balancing and failover methods, apparatus and systems use more than one gateway device in a gateway device group for communications directed outside of a LAN. In the load balancing arrangement, hosts that send ARP messages to a shared virtual IP address receive replies from one of the gateway devices in the gateway device group, directing the host to address outgoing communications to a virtual MAC address assigned to one of the gateway devices. Hosts are assigned virtual MAC addresses for the gateway devices according to a prescribed algorithm or methodology. In the event that one member of the gateway device group fails, the outgoing communications that would have been handled by the failed gateway device are re-assigned to another member of the gateway device group. A master gateway device controls address assignment and failover features. In the event that the master fails, additional steps are taken to appoint or elect a new master and ensure continuity in the load balancing function.

Standard mobile cellular telephones use shortened burst signal transmissions to synchronize the transmission of a call over a cellular telephone network. These shortened bursts as well as other traffic channel bursts can be used to locate the position of the cell phone. In operation, a primary base station sends a traffic channel designation message to a selected mobile phone which then initiates selected traffic channel burst transmissions, such as shortened bursts, over an interval of five seconds or less. The primary station and at least two other neighboring base stations receive these burst transmissions and determine their respective distances from the cell phone based upon the time of arrival of the bursts or some other suitable distance related measurement. A command center determines the location of the cell phone by triangulating the distance measurements of the base stations.

An object of the present invention is to prevent from concentrating communication on one terminal, thereby avoiding an increase in power consumption and thereby prolonging the network configuration time when forming a network by a plurality of devices. A wireless communication device Pa established as a master receives battery information including battery remaining amount, communication possible time, a possibility of becoming a master, from wireless communication devices Pb, Pc, Pd established as slaves within a wireless network, and decides a candidate terminal for the next master based on the battery information. A master/slave switching instruction is issued to a candidate terminal for the next master from the wireless communication device Pa, under a master/slave switching condition, when the battery remaining amount of the master becomes the established value or less, and the like. This can prevent from concentrating communication on one terminal, so to make the power consumption of the respective terminals uniform and prolong the configuration time of the wireless network.

The invention discloses a non-intrusive mode electrical load identification system and method. The load identification system comprises electrical load, a load identification terminal and a load monitoring main station; and the load identification terminal performs information interaction with the load monitoring main station through modes of optical fibers, an Ethernet and a wireless public network. The load identification terminal, by analyzing waveform characteristics of current, voltage, active power and the like of typical electrical equipment, defines different characteristic parameters based on a steady state process and a transient state process to establish a standard transient library, and then establishes an electrical load identification model by combination of the steady state and the transient state characteristic similarity of the electrical equipment. The identification system module is high in integration level, the terminal is smaller in size, the construction cost of the system is lower, the running and maintaining of the system are simple without affecting production and life of users; and the non-intrusive mode electrical load identification method can realize accurate identification of load types and running states of multiple paths of electrical equipment at the same time.

A Bluetooth master radio frequency unit addresses a slave radio frequency unit, to enable the slave to synchronize to the master, by sending poll packets and optionally null packets over an active link, the master being arranged so that receipt of a response from the slave unit to a poll packet is sufficient to maintain the active link. The slave unit does not have to respond to all of the poll packets. This approach can allow the slave to preserve more (transmit) power by going into a deep sleep mode in which a low power oscillator may be used while still allowing the master unit to detect whether the slave has resynchronized or not (and thus to update a Link Supervision Timer, for example).

The invention discloses a method for converting an SCD (Substation Configuration Description) model into a dispatching center CIM (Common Information Model), which is characterized by comprising the following steps of: (1) establishing a complete SCD model; (2) deleting models which are not needed by a primary station and minimizing the SCD model; (3) realizing mapping between the SCD model and the CIM; (4) deriving a single line drawing file in an SVG (Scalable Vector Graphics) format by the CIM and meanwhile establishing an association relationship between an SVG single line drawing and the CIM; (5) after the primary station obtains the CIM and the SVG single line drawing file of a substation, testing validity; and after passing the test, splicing the models and meanwhile establishing a database by the association relationship between the SVG single line drawing and the CIM. The invention can automatically explain real-time data, reduce repetitive time-consuming work which easily causes mistakes, such as manual signal check, and the like, and meet the maintenance requirement of a source terminal directly by adopting a self-describing model established by the substation.

A method of operating a radio communication system in which secondary stations use dedicated time slots to request services from a primary station. A secondary station wishing to request a service sends a request in every time slot allocated to it until it receives an acknowledgement from the primary station. The primary station can use combining techniques on multiple time slots to identify the presence or absence of a request from a secondary station with improved accuracy.

A communications device 1a is a primary station which communicates with a secondary station. The communications device includes a communications protocol analyzing section 160a and a protocol control section 110. The section 160a is capable of receiving both a first response to the first-connection-routine command and a second response to the second-connection-routine command. The first and second responses are distinguishable from each other. The section 160a determines by analyzing an incoming response whether the response is the first response or the second response. The section 110 connects to the secondary station using the first protocol if the communications protocol analyzing section 160a determines that the response is the first response and using the second protocol if the communications protocol analyzing section 160a determines that the response is the second response.

An intelligent system for collecting readings from electric meters, comprising the following components: several electric meters, a data concentrator connected to the electric meters, and a system main station connected to the concentrator wirelessly, in which: the electric meter for recording the consumed quantity of electricity by user, metering the quantity of electricity, measuring demand and making a fault recording, and supporting a time-sharing measurement and communication with the data concentrator by electric power carrier; a concentrator for providing intelligent relay management, implementing the communication with the electric meters and the system main station, the management of communication route of electric meters and the storage function of data; the system main station for realizing a stable bi-directional communication with the concentrator and several electric meters, reading data in the concentrator, collecting information on electric energy, synchronizing the time of the concentrator and the electric meters associated therewith, renewing time step tariff rate and meter parameters of the electric meters. Bi-directional stable communication between the main station and the intelligent electric meters and collection of electrical energy information and the adjustment of parameters of electric meters can be realized by transmission medium in the present invention. The system of the present invention features complete functions, stable user-friendly operation interface, and has good expansion potential. Therefore this system is an important technical means for user-side management. The present invention greatly improves management efficiency and economic benefits in the electrical power department.

A communication system comprises a downlink data channel for the transmission of data packets from a primary station to a secondary station and two uplink control channels, a first channel for transmission of status signals to indicate the status of received data packets and a second channel for transmission of pilot information. In operation, on detection (402) of a data packet the secondary station increases (404) the transmission power of the second channel, thereby enabling the primary station to obtain a better estimate of uplink channel properties and hence increase the accuracy with which it can decode the status signal. The secondary station transmits (406) the status signal, typically either an acknowledgement (ACK) or negative acknowledgement (NACK), and decreases (408) the transmission power of the second control channel signal. The increase and decrease in power are not necessarily identical, for example as a result of the effects of power control.

In a radio communication system having a data channel for the transmission of data packets from a primary station to a secondary station, a plurality of downlink control channels are used to signal information relating to packet transmission. A problem with this scheme is that with a fixed control channel allocation system throughput (T) for a given offered load (O) can be significantly reduced in a worst case scenario (for example two secondary stations using the same control channel). One solution uses an indicator signal to inform a secondary station of the control channel it should receive, but this adds significant complexity to the system. The present invention provides a simpler scheme having similar benefits by shuffling the allocation of control channels to secondary stations, according to a defined sequence for each secondary station, thereby avoiding the worst case scenario.

The invention relates to an area intelligent power distribution network system. Based on a management platform with a main station, a feed line, a power distribution network and centralized checking in one body, data in an area is centralized in a low voltage distribution information system for processing. The low voltage distribution information system is background application software with distribution monitoring metering, low voltage reactive compensation, a user electric quantity centralized checking system, a load control management system, and harmonic wave monitoring analysis in one body, and automation of acquisition and management of low voltage distribution network data is realized. According to the system, intelligent safety monitoring is carried out on a 10 kV distribution line and a distribution terminal device, simultaneously accurate and scientific intelligent monitoring is carried out on a 400 V distribution line, an operation status of distribution transform is grasped and reasonable management is carried out according to a requirement, by utilizing information positioning and navigation of the power distribution network, timely reaction can be carried out on an equipment line or fault, the fault is isolated automatically, distribution recovery is rapid, power supply quality is improved, and intelligent automatic management and control of an area intelligent power distribution network are realized.

The invention discloses a monitoring method of a power system, comprising the following steps of: acquiring a running state signal of the power system in real time by a sensor positioned in a power grid; sampling the running state signal by taking a second pulse signal of a satellite synchronous clock as a sampling reference signal and outputting the acquired data to a function application unit of a data application layer through an optical fiber communication interface by a data acquisition unit; and analyzing and processing the acquired data and transmitting the processed result to a main monitoring station through the function application unit. The invention integrates functions of phasor quantity monitoring, fault recording, traveling wave fault location and the like into a monitoring device, considers the expanding demand of a hardware platform on realizing an IEC61850 communication protocol system in the selection of the hardware platform and realizes the monitoring in the whole process of the running state of the power system. The functions realized by the three sets of traditional equipment are realized by one set of equipment, and the secondary wiring is reduced, so that the maintenance cost and the asset investment can be greatly reduced.

The invention discloses a multi-dimensional intelligent remote inspection system for a transformer substation, which adopts independent networking and receives various operation information of a station end integrated automation system, and is in communication connection with a video center main station to obtain remote view data, remote measurement data, remote control data and remote signaling data; the dispatching center SCADA main station system is in data communication with the station end integrated automation system and receives various kinds of operation information of the station endintegrated automation system; and the video center main station is also in data communication with the dispatching center SCADA master station system to provide real-time video verification for remotecontrol operation of the dispatching center SCADA master station system. According to the invention, a powerful intelligent monitoring and emergency command platform is provided for production linksand security links such as remote control operation and remote equipment inspection of scheduling personnel, field operation and emergency disposal of operation and maintenance personnel and the like,can be suitable for actual application of power production, and ensures safe operation of power grid production.

An apparatus which provides the ability to charge or power multiple devices from multiple different power sources, and to communicate electronic data to and from one of the devices. The apparatus utilizes simple construction, requiring no active electronics, thereby reducing the cost of production and the reliability of the device. The apparatus employs a single USB connection cable with connectors on both ends and a second power-only cable and connector which is connected to the power wires of the USB cable and thereby is able to power a second portable device from a single USB port. USB master provide sufficient power for two average portable devices without additional circuitry. Moreover, restricting the data path to only one device also eliminates the need for USB hub circuitry. Finally, greater end user flexibility is provided by using a USB male connector as the source of the data and power connection, a USB female connector for the output of the data and power connection, and a standard barrel-type power connector for the power-only output connection. Having two different output connectors ensures that the user will not confuse the two connectors.

The invention relates to a relay protection running management information system, which consists of a main station layer, a substation layer and an equipment layer, wherein the main station layer consists of a database, an application layer and a client layer; the database is used for storing system structure model data and historical sampling data; the application layer realizes encapsulation of system application logic at a server end; the client layer comprises a system model management module, a fault analysis module, an equipment management module and a valuing and checking module which are flexibly distributed under network environment and serve as client application, and a communication management module; and the substation layer comprises a communication service module and a system management module, and is used for accessing various IED devices in field, communicating with the IED devices in field and completing protocol converting and data forwarding functions. The system improves the informatization and intelligence levels of a power grid safety running dispatching system, and can provide real-time fault information for the dispatching when a power grid is failed so as to improve the automation level of the dispatching.

The invention discloses a dispatching automation digital physical hybrid simulation training system. A primary device is a power network simulation system, and a secondary device comprises a control center main station and/or an intelligent substation. The control center main station comprises a control system server, and the control system server is respectively connected with the intelligent substation and a digital physical hybrid simulation system. The digital physical hybrid simulation system comprises an interface portion and a simulation power network portion, the interface portion is provided with a station signal simulation terminal and a digital physical interface device, the digital physical interface device is connected with the intelligent substation, the simulation power network portion is provided with the primary device, and the primary device is respectively connected with the station signal simulation terminal and the digital physical interface device. A real operating environment is provided for simulation training by seamlessly connecting the secondary real device, a real dispatching automation system and the primary simulation device through the digital physical interface device.

In a passive optical network system, in order that by measuring a transmission distance and a transmission time between an OLT and an ONU in operation of the system, if the distance or the time is short, communication is conducted at a high transmission speed to increase a capacity of user; if the distance or the time is long, communication is conducted at a low transmission speed to increase the capacity of user communicating in a state in which a predetermined quality is secured, a main station includes a signal communication circuit to communicate with subsidiary stations at a first or second transmission speed and a controller to measure a transmission distance or a transmission time between the main station and each subsidiary station. Based on a result of the measurement, the controller selects a transmission speed for communication with the subsidiary station.

The invention discloses an intelligent electric meter system for residents for an intelligent smart grid. According to the intelligent electric meter system for the residents for the intelligent smart grid, one intelligent electric meter is arranged in home of each resident, two control terminals are respectively arranged on each controlled electric appliance and each user switch, and each distributed power supply is provided with a distributed power supply access device; each control terminal and the distributed power supply access device are interconnected through a PLC (Programmable Logic Computer) communication network, and the intelligent electric meter and a high-class measuring system AMI (Advanced Metering Infrastructure) carry out information interaction. The intelligent electric meter system is suitable for the residents having tiered pricing for electricity and time-sharing pricing for electricity, and aims at minimum electric charge expenditure of users, and is used for intelligently controlling the electric appliances and the distributed power supplies of the residents so as to realize peak clipping and valley filling of the electric charge, and provide power supply quality and power supply reliability.

Symmetrical and asymmetrical ad-hoc, wireless networks and a method for saving power in the same may include causing a first station to determine whether a second station has a master capability to buffer data traffic for the first station. A first station requests the second station to buffer the data traffic intended for the first station for a first predetermined period. The first station enters a first power save mode, and the second station buffers the data traffic for the first station for the first predetermined period. The first station exits the first power save mode after the first predetermined period and the second station sends the buffered data traffic to the first station. Both the first and second stations may have master capabilities, or only one of the first and second stations may have a master capability.

The invention discloses a record and test system of multiple-event sequence, which is characterized by the following: adapting on-site CAN bus to do communication connection; recording the sequence of happening time corresponding to the condition deflection when the monitored object occurs SOE case. The system contains a case of GPS, main station computer, at lest two middle controllers, at least two communication servers and at least four SOE substations, wherein the GPS provides time mark; the computer sends clock signal A to all middle controllers, which select one controller as datum clock station to send time setting signal B,C to other middle controllers and all substations; the communication server transmits clock signal A to all SOE substations to affirm and record SOE event; the millisecond clock in the SOE substation is started by signal C to generate millisecond clock signal D and integrate with A to form clock signal E of SOE substation, which judges and uploads SOE event. The invention confines the synchronous and monitoring resolution error not more than 1 millisecond.