5951 results about "Master station" patented technology

A remote control flexible instrument system, employing a shaft which supports a tool, is described in which the has proximal and distal ends with at least a portion thereof extending through a lumen of the human body so as to locate the shaft at an internal target site. A master station including an input device provides control of the instrument situated at a slave station. The master station can control at least one degree-of-freedom of the flexible instrument. A controller intercouples the master and slave stations and is operated in accordance with a computer algorithm that receives a command from the input device for controlling at least one degree-of-freedom of the catheter so as to respond in accordance with action at the input device. The flexible instrument further comprises a controlled flexible segment along the shaft, for controlled bending at the flexible segment to guide the shaft and to dispose the tool at an operative site.

The present invention relates to a system and method for diagnosing and isolating problems and for monitoring operting conditions on an automobile. The system includes a hand held unit and a master station which can operate alone or in unison to accomplish functions such as logging and displaying data on a real-time basis, logging data remotely and displaying the data at a later time, diagnosing fault conditions, monitoring operating parameters, reprogramming on-board vehicle controllers, displaying service manual and service bulletin pages and ordering parts on-line.

A system for tracking an activity in a healthcare environment includes a master station having a processor, a memory, and a transceiver, badges coupled to objects, each transmitting a unique badge ID, and sensors disposed throughout the environment, each including a transceiver for receiving badge IDs and transmitting to the master station transceiver the badge IDs and a unique sensor ID that relates the sensor to a location. The master station processor determines object locations from the badge and sensor IDs by identifying the badge associated with the object, relating the sensor ID to the sensor location, and storing object location information in memory. Each badge also includes a displacement sensor that generates signals indicating object movement and direction for transmission to the sensor transceivers which forward displacement information to the master station. The master station processor uses the information to update the stored object location information.

The present invention provides a path setting method for automatically setting network paths. The path setting method for generating paths in a network including a plurality of relay stations and a parent station which are connected with each other through a transmission line, comprises the steps of allowing each of the parent station and the plurality of relay stations to transmit basic information including its own identifier and its own path setting status, by means of a repetitive broadcast, allowing the relay station receiving the basic information to recognize the parent station or another relay station having a temporary path set thereto and transmit its own receiving-environment table including a transmission quality on the transmission line to the recognized station, allowing the another relay station receiving the receiving-environment table to forward it to the parent station through the use of the temporary path so as to notify the receiving-environment table to the parent station, and allowing the parent station receiving the forwarded receiving-environment table to set a temporary path to the relay station which has transmitted the receiving-environment table. In this manner, the parent station collects the transmission qualities on the inter-station transmission lines stepwise in order of the closest relay station to the farthest relay station to automatically set the paths.

A single frequency relay station receives a signal from a master station, and retransmits it. Before retransmitting the signal, the relay station uses a digital filter to subtract from the signal components which arise from multipath interference and coupling interference. The coefficients used by the digital filter are derived from characteristics of the multipath interference and the overall transfer function of the relay station. These are derived by turning off the retransmission, so that the multipath interference can be estimated from the received signal, and commencing the retransmission again, to determine the transfer function. A simplified inverse fast Fourier transform is used to simplify the calculations.

There is provided a Bluetooth apparatus which can be easily associated with a Bluetooth device address (BD-ADDR) in a Piconet. When a Bluetooth master apparatus selects a Bluetooth slave apparatus to be connected, the selected apparatus is clearly indicated by a selection notifying operation performed by the slave apparatus using a display or sound. When each slave apparatus has an identification number which is unique and well known, the number is returned to the master. The master apparatus registers such a number in association with a BD-ADDR.

A technique for combining transmission bandwidths of several communication devices, such as mobile stations is disclosed. A master mobile station establishes a WLAN access point communicating with WLAN client terminals. One or more slave mobile stations may detect a predefined network identifier and join the WLAN network. The master assigns IP addresses for the client terminals and slave mobile stations. The master also resolves DNS queries in cooperation with external DNS servers. Traffic, including internet packets, between the client terminals and various internet hosts is tunneled over multiple simultaneous transmission paths between the master and a multiplexing / demultiplexing computer). The inventive bandwidth combination technique is transparent to the client terminals and the internet hosts.

The invention relates to a monitoring system and specifically relates to a plant-level comprehensive supervision platform. The plant-level comprehensive supervision platform comprises a front-end system, a transmission network and a master station system, wherein the front-end system is integrated with subsystems of video monitoring, environmental monitoring, security guard, fire alarm, one-card-through, entrance and exit control, maloperation prevention, gps positioning, intelligent lighting, intelligent control and the like in a thermal power plant; the transmission network functions as a bridge for connecting the front end and the platform; the master station system comprises a local monitoring center, a cloud computing system, an application platform and a whole network operation and maintenance platform. The comprehensive supervision platform is a large online monitoring system integrated with hardware, software and network; the platform software is taken as the core to realize centralized management on all zones; besides, centralized monitoring and uniformed management on the front-end system can be realized at a regulation and control center; in short, the plant-level comprehensive supervision platform escorts the smart grid.

A method and system for a Radio Frequency (RF)-based identification, tracking and locating of objects. The method and system use a narrow bandwidth signal in VHF of lower frequency range, which minimizes propagation loss and loss of accuracy of the RF locating signals. The signal is sent from a Master Unit(s) to a Tag. The signal traveling time is recorded and the distance between the Master(s) and the Tag is calculated. The method and system allow achieving a longer distance of the RF signal penetration and an increased accuracy by using VHF bands. The techniques of Digital Signal Processing and Software-Defined Radio are used. The actual waveforms transmitted and received by the radios are defined by the software. The roles of the Master Unit(s) and the Tag can be reversed.

A wireless access system and method are provided by which the wireless communications area covered by a single access point is increased while maintaining the maintainability of the access point, minimizing an increase in system cost, and avoiding the hidden terminal problem. An access point (12) and terminals (16a to 16c) are connected via a master station (13), an optical multiplexing / demultiplexing section (14), and slave stations (15a to 15c). A downstream signal to the terminals (16a to 16c) from the access point (12) is transmitted such that the master station (13) outputs the downstream signal to each of the slave stations (15a to 15c) in a distributed manner through the optical multiplexing / demultiplexing section (14). An upstream signal to the access point (12) from any one of the terminals (for example, 16a) is transmitted to the master station (13) through a slave station (for example, 15a) and the optical multiplexing / demultiplexing section (14), and also sent to all other slave stations (for example, 15b and 15c) through the master station (13) or the optical multiplexing / demultiplexing section (14).

A method and system for a Radio Frequency (RF)-based identification, tracking and locating of objects. The method and system use a narrow bandwidth signal in VHF of lower frequency range, which minimizes propagation loss and loss of accuracy of the RF locating signals. The signal is sent from a Master Unit(s) to a Tag. The signal traveling time is recorded and the distance between the Master(s) and the Tag is calculated. The method and system allow achieving a longer distance of the RF signal penetration and an increased accuracy by using VHF bands. The techniques of Digital Signal Processing and Software-Defined Radio are used. The actual waveforms transmitted and received by the radios are defined by the software. The roles of the Master Unit(s) and the Tag can be reversed.

This invention concerns a network comprising a master and slaves. In the network, each slave figures out its performance values as performance parameters and transmits the performance parameters to the master. The master performs a process of selecting a backup master as a candidate for the next master, on the basis of the performance parameters transmitted from the slaves. The master supplies BM information containing synchronization information and the address of the backup master selected, to the slaves. When the master is removed from the network, the slaves determine the next master in accordance with the backup-master information. Thus, the slaves can be immediately connected to the next master.

The invention discloses an intelligent auxiliary comprehensive monitoring and D5000 comprehensive linkage platform of a transformer substation. The intelligent auxiliary comprehensive monitoring and D5000 comprehensive linkage platform comprises an intelligent auxiliary facility monitoring system, a dispatch-end video master station, an information integrated platform, a transformer substation automatic system and an isolating device. The dispatch-end video master station adopts a network high-definition ball for monitoring video surveillance inside and outside the transformer substation and meanwhile is provided with a network hard disc video cassette recorder for acquiring and uploading real-time videos, planning a warning line and a warning region of a switching station and performing intelligent analysis to produce warning signals. The transformer substation automatic system monitors a power protection device at the front end of a power grid and uploads acquired data to the information integrated platform. The transformer substation automatic system and the information integrated platform are communicated through the isolating device. The safe and reliable running of the intelligent transformer substation is ensured.

The invention relates to an emergency protection circuit device capable of completing automatic switching when an AC-DC power grid is in an abnormal state, and in particular relates to an intelligent warning and control method dedicated for ensuring safety and stability of the power grid. The method comprises the steps that: an intelligent control master station acquires real-time data of the power grid through an EMS (energy management system), and an intelligent control substation in each zone real-timely monitors the bus voltage of the zone, power-receiving channel overload, main transformer overload in the zone and voltage instability of the power grid in the zone, and starts the power grid safety and stability control operation; the acquired real-time data of the power grid is integrated with the information uploaded by each substation to real-timely form tide section data of the power grid, and the safety and stability of the power grid are evaluated online; and safety and stability early-warning information of the power grid is provided by using the real-time operation data of the power grid to realize safe and stable control of the power grid and to realize the function of the second line of defense of the power system. The method provided by the invention can ensure safe and stable operation of the power grid by regulating a stability control device according to the running condition of the power grid.

A wireless data communication system is operable in a power saving mode wherein stations are synchronized to be in an awake state to receive synchronizing messages (TIM, PSYNC) and traffic indicator information and are changed to a doze state if they are not to receive data messages. In one embodiment all stations (20) communicate via a base station access point (16), which broadcasts synchronizing messages (TIM) at regular intervals identifying stations (20) that are to receive data messages. In another embodiment all stations (220) communicate directly with one another, one station assumes the role of a master station and broadcasts synchronizing messages (PSYNC), and stations (220) desiring to transmit data messages transmit traffic indicator messages (PTIM) to the appropriate destination stations (220), in a synchronized awake period just before the next synchronizing message (PSYNC) is expected to arrive.

The invention discloses vehicle-mounted fault diagnosis system and method for a hybrid electric vehicle based on CANopen, belonging to the field of vehicle fault diagnosis. The vehicle-mounted fault diagnosis system for the hybrid electric vehicle based on CANopen comprises a fault diagnosis interface, an information acquisition module, a storage module, a liquid crystal display module, an audio alarm module, a touch screen and keyboard module, a main control module and a power source module. When a fault occurs, the diagnosis system as a CANopen master station utilizes an emergency message to trigger a SDO (Service Data Object) to read the fault diagnosis information of an object dictionary item corresponding to the fault, analyzes the fault information and stores the fault information in a fault information management unit; meanwhile, the fault information is displayed in a fault diagnosis interface. The invention completes the real-time acquisition and display of the fault information and vehicle real-time data and the effective management of the fault information.

The invention relates to an electric energy information acquisition integrated platform, which includes a field terminal layer, a communication network layer, and a master station application layer. The field terminal layer can realize collection and remote transmission of field data in terms of different user types classified according to field user characteristics. The communication network layer can realize remote data transmission and load control administration by using hybrid networking technology. The master station application layer includes a database system, a front end processor system, an operation master station, a data analysis system, a WEB system, an automatic task system, and an external interface system; and can realize comprehensive electric energy information acquisition of six types of objects including an upper gateway, a lower gateway, a distribution / transformation gateway, high voltage users, lower voltage users and resident users, and realize operational administration and data analysis application function. The invention can realize metering of overall process including online of a power plant, power transmission / transformation, power distribution, and transmission to user, and information concentration acquisition, integrated storage management and distributed application of an examination gateway in an integrated platform.

The invention relates to an intelligent warning and fault analysis realizing method applied to an intelligent transformer substation monitoring system, which belongs to the technical field of transformer substation automation. An intelligent warning and fault analyzing module is used for analyzing various pieces of information reported by a measurement and control device, a protective device and a fault recorder, generating a fault analysis report by combining topology with every fault in an automatic identification fault reasoning model, and submitting the generated fault analysis report to a scheduling master station at a master station end. The workload of personnel on duty is greatly reduced, and the fault processing efficiency is improved. The requirement of an intelligent transformer substation on an intelligent warning and fault analysis system can be met, faults can be quickly judged and analyzed, and processing schemes can be provided so as to assist the personnel on duty in quickly processing the faults, and reduce the loss caused by the faults.

Terminal devices F and G store statistical information related to interference from an external communication system, and notify the stored statistical information to a master station E. The master station E determines the terminal device G as a candidate station for a master station capability handover destination based on collected statistical information. The master station E requests to hand over a master station capability to the terminal device G. If it is determined that the terminal device G accepts handover of the master station capability, the terminal device G starts to act as the master station.

The invention discloses an active power control method of master station-end wind power field subject to wind power grid integration for a large-scale wind power integrated network, and belongs to the technical field of power systems. The method comprises the following steps of: providing a regional power grid active scheduling framework containing wind power field control, predicting newly increased functional short and ultra-short wind power by adopting the control principle of wind power-based predicted ''generating plan tracking'' serving as a main aspect and wind power unit ''direct frequency modulation participation'' serving as a secondary aspect, and describing auxiliary frequency modulation; providing data flow design of an active scheduling system containing wind power field control; providing a wind power field active power control mode to improve the wind power receiving capacity of the power grid by wind power participating power grid active control based on the current wind power control technology; and providing stable section-based wind power field active power control so as to further solve the wind power consume problem under high wind power permeability rate by using the renewable energy source such as maximum dissipated wind power and the like as principle on the premise of ensuring that the wind power of the system is connected to the important section stability margin.

The invention discloses an automatic identification method and system of low-voltage power distribution network topology based on based on power frequency carrier communication technology. A concentrator and an automatic topology identification device are installed beside each transformer in a low-voltage distribution network court, the concentrator and the automatic topology identification device are connected by a 485 line, a dual-mode collector is internally or externally arranged on an intelligent electric meter of the low-voltage distribution network court, an intelligent power distribution network topology identification master station is installed in a power marketing center or a power operation and inspection department, then the intelligent power distribution network topology identification master station performs automatic identification via the above equipment, the automatic identification converts the newly established topology link relation table data into a geographical topology diagram and a logic topology diagram of the low-voltage power distribution network, updates the original geographical topology diagram and the original logic topology diagram of the court, and records a topology state change event. The automatic identification method and system disclosed by the invention are conducive to updating the data in real time and greatly improving the timeliness of operation and maintenance, and patrol and repair, and play an important role of improving the economic benefits of power enterprises.

A communication system performs bidirectional communication through a same communication path every communication cycle period between a master station and a slave station. From the start of the communication cycle period until an interval period shorter than the communication cycle period elapses, the master station transmits master data represented at a first ratio of first pulse width to the communication cycle period to the slave station. In a remaining period after the interval period in the communication cycle period, the slave station transmits slave data represented at a second ratio of second pulse width to the interval period to the master station.

The invention discloses a variable air volume air-conditioner control system with a variable frequency fan and a digital air valve for adjusting tail end air volume and an implementation method, belonging to the technical field of the control of a variable air volume air-conditioner system. The variable air volume air-conditioner control system structurally comprises a master station DDC (direct digital control) controller, a tail end temperature controller, a filed bus, a tail end variable air volume box (VAV-BOX) and an air valve driver, comprises mater station DDC control and tail end temperature controller control in control types, and adopts a strategy of collective processing at first and decentralized control later. Through a method for adjusting the tail end air volume by the variable frequency fan and the digital air valve, the variable air volume air-conditioner system eliminates throttle energy loss of the air valve without a device for measuring the air volume, has simple control type and no influence on the operation of the whole variable air volume system, and has the advantages of good system stability and obvious energy-saving effect; and the fault on the variable air volume tail end device of certain node has no influence on the normal operation of other variable air volume tail end devices.

The invention relates to a smart micro-grid system. The smart micro-grid system comprises a local control layer, a network communication layer, a master station layer and a software layer, wherein the local control layer is in communication with the master station layer through the network communication layer, and the master station layer is in communication with the software layer through an information interaction bus. The smart micro-grid system integrates photovoltaic power generation, wind power generation, multiple types of energy storage systems multiple in capacity and modern power electronic, communication and control technologies. While high-reliability power supply is achieved, optimized allocation of renewable energy resources and high-reliability power supply to loads in a micro-grid are achieved; the interaction relation between the micro-grid and an external power grid is reflected correctly, and the effect of distributed energy on improvement of power supply reliability is fully shown; operation data of photovoltaic, wind power and energy storage systems and the micro-grid systems can be collected and stored, and the operation data are accumulated for researches on key technologies about micro-grids. The smart micro-grid system solves the problems that an existing micro-grid system is low in energy utilization ratio and poor in environmental benefit, electric energy quality and power supply reliability.

The invention discloses an embedded system capable of upgrading software on line and an online upgrading method. The system comprises an embedded terminal, and a remote master station, a short range master station and a local master station which can respectively transmit data with the embedded terminal, wherein the embedded terminal comprises a master control chip, a program memory, a data memory, a remote communication interface and a local / close communication interface; the program memory of the embedded terminal is divided into a region A and a region B which have equal structures, when the master station transmits a software package to the embedded terminal, a bootstrap process of a system of the embedded terminal is sequentially performed from the region A to the region B in turn, and a bootstrap region is converted when the software of the system is upgraded each time; and double backups of system program are saved in the program memory, and if the upgrading process is failed, the system program can be recovered from a region in which the system program is successfully started last time. By the method, various abnormal situations in the online upgrading process can be effectively identified, and corresponding measures are taken for repair, such as error retransmission, resume from break point, invalid abandon or failure recovery, so that the correctness and robustness of online upgrading can be ensured.

The invention discloses a security encryption authentication module for power distribution terminal communication and a method thereof. The security encryption authentication module comprises a main control chip, a commercial code algorithm encryption chip, a communication interface and a storage unit; the main control chip is connected with the commercial code algorithm encryption chip, the communication interface and the storage unit and receives message information of a front-end processor of a distribution master station and a distribution terminal through safe interface software of the distribution terminal to overall manages the other modules, and the commercial code algorithm encryption chip encrypts or decrypts the message information received by the main control chip. The special encryption chip is adopted in the security encryption authentication module, response speed is increased, and dependence on a CPU and an internal storage is reduced. Besides, communication security is greatly improved by means of bidirectional authentication of verifying each other's identity between the security encryption authentication module and a distribution security interaction gateway.

Power distribution networks of countries such as China and the like mainly adopt a low-current grounding method. Most faults of the low-current grounding power distribution networks are single-phase high-resistance grounding faults and low amplitude of transient capacitive current signals, short duration, and high detection difficulty are generated in a fault process so that an effective fault detection and positioning system is lacked. The invention discloses a fault detection and positioning method and system for a low-current grounding power distribution network. The system includes feeder line monitoring units, a communication terminal and a system master station. A feeder line monitoring unit wirelessly and synchronously triggers the other two phases to transmit data after a suspected grounding fault is detected. The system master station and the communication terminal adopt GPS time service. The communication terminal and the feeder line monitoring units carry out time hack through a time division multiplexing wireless communication network. The system master station collects three-phase feeder line monitoring unit data at a plurality of points through the communication terminal and detects and positions a grounding fault according to calculated zero-sequence voltage and zero-sequence current and issues a fault signal to feeder line monitoring units in front of a fault point on a fault phase so as to carry out fault indication.

Each communication station, at least, periodically transmits / receives a beacon at regular intervals and manages the transmission / reception using a neighboring-station list (neighbor list), thereby managing the network of the communications station in a distributed manner. In addition, a save area is provided in which n beacons transmitted / received at regular time intervals are managed in a neighboring-station list, thereby making it easy to schedule list reading / writing processing when the list is updated during the reception of a new beacon. When the network topologies are crossed over, a load for network management can be reduced. Thus, it is possible to provide a wireless communication system in which a system timer and a master station that controls common frame time do not exist in a domain included in the system.

A method of controlling and sharing access to a wireless network wherein some stations of the network may be out of range of other stations of the network. The method includes the steps of: first, each station periodically transmits a beacon containing a bit map having a bit location for every station on the network and monitoring the beacons of stations within its range; second, in response to a beacon being no longer detected, each station transmits a bit map containing an indication of only the stations that it can still receive; third, on receiving a bit map with not all stations indicated, each station responds by adding stations that it can receive to the received bit map and transmitting the updated bit map; fourth, each station repeats the third step until the updated bit map indicates that all stations are still in the network or that a station is missing from the network; and finally, if a station is indicated to be missing from the network, each station updates the bit map. Through the application of these steps, the invention controls access to the network without a global master. The present invention has the advantage of controlling a network without the need for a central master station, and does not require continuous global knowledge of the topology of the network.