191 results about "Device Grid" patented technology

A method and apparatus for providing channel access coordination in a BSS or a wireless mesh is presented. A control channel is assigned to a control radio. At least one data channel is assigned to at least one data radio. Control signals are transmitted and received on the control channel, and data is transmitted and received on the at least one data channel. Acknowledgements for the data are received on the control channel. A node having a plurality of radios can transmit and receive traffic on different data channels simultaneously.

A device and system for generating electricity with a photovoltaic floatation device is provided. The device comprises one or more photovoltaic cells, which are attached to a panel that is removably attached to a floatation element. The device allows users to utilize the surface areas of water for placement of photovoltaic cells. Multiple devices can be mechanically connected to allow for the formation of one or more photovoltaic floatation device grids. The system comprises one or more photovoltaic floatation devices that are anchored to a particular area in a body of water and are electrically connected to one or more inverters.

A system for providing a tree topology for a network having an interior gateway protocol. A first router receives a hello message from all connected routers in the network. The hello messages include tree topology information. The first router then uses the tree topology information to determine a parent of the router. The first router then establishes connections with directly connected routers at the same level in the tree topology. The first router also generates link messages that include all of the prefixes for children of the first router and broadcasts the link messages.

A system and method for the ad hoc distribution of resources within a wireless grid for coordinating dynamic resource sharing. The architecture of the present invention comprises four primary modules: a resource descriptor that specifies the language for defining the resources; a service agent that facilitates interactions between the requesting devices and available resources; a resource manager that defines the methods by which the resources are shared, used, managed, and paid for; and a session manager that handles the establishment of sessions between mobile devices in a manner that does not require a centralized name service or directory. The combination of these modules allow for the rapid development of applications based on the wireless grid technologies using these common building blocks.

A system is configured to store user preferences relating to selection of a network, from a group of networks, via which to establish a connection, where the user preferences includes information for selecting the network based on rates and information for selecting the network based on signal strength or quality levels; receive, from a server device that communicates with the group of networks, a set of rates associated with use of the group of networks; detect signals transmitted by the group of networks; determine, for the group of networks, signal strength or quality levels associated with the signals transmitted by the group of networks; select a particular network, of the group of networks, based on the user preferences, the set of rates, and the signal strength or quality levels; and establish a connection via the particular network.

In accordance with a preferred embodiment, the present invention comprises a method for using the remaining TxOP time by the peer node to forward traffic to a different destination, a method for using the remaining TxOP time by the original node to send traffic to a different destination, a method for using the remaining TxOP time by a neighbor to send traffic to the original node, a method for using the remaining TxOP time by a neighbor to send traffic to another node, a method to signal the reuse rules of the remaining TxOP time, and a method to efficiently relinquish / truncate a TxOP to reset the NAV for the neighborhood.

An embodiment of the present invention discloses a method for accessing a network, comprising the steps of: connecting with an access point through a wireless and / or wired mode by a main sound box; according to a local area network established by the access point, connecting with a terminal accessing the local area network; establishing a wireless mesh network special-purpose access point, searching a slave sound box within a signal coverage range, and enabling the slave sound box within the signal coverage range to access a wireless mesh network established by the main sound box; and if the main sound box connects with the access point through a wireless mode, transmitting connection information of the access point to the slave sound box through the wireless mesh network, so as to access the access point through a wireless mode by the slave sound box. The embodiment of the present invention also discloses a wireless sound box and a system. Through adoption of the method of the present invention, a plurality of wireless sound boxes can access a network, and stability of data downloading can be improved.

The invention discloses a self-aligned graphene field effect transistor and a manufacturing method thereof. The self-aligned graphene field effect transistor comprises a semiconductor substrate, an insulating layer, a conducting channel, a source electrode, a drain electrode, a gate dielectric layer, gate metal, self-aligned metal, the insulating layer is formed on the semiconductor substrate, the conducting channel is is formed on an insulator and formed by graphene, the source electrode and the drain electrode are formed on two sides of the conducting channel respectively, the gate dielectric layer selectively deposits on the conducting channel between the source electrode and the drain electrode, the gate metal is formed on the gate dielectric layer, and the gate dielectric layer and the gate metal are simultaneously and graphically piled together to form a gate accumulation layer to control carrier concentration of a channel area. A self-aligned metal layer covers on the source electrode, the drain electrode, the conducting channel and the gate metal, so that the area of a region not being covered by a grid and self-aligning of a device grid and the source electrode as well as the drain electrode is realized.

The invention relates to a method used for balancing three phases of direct current side voltages of a chain power regulating device, and belongs to the technical field of the control of power electronic devices. The method comprises the following steps of: acquiring direct current side voltages of each H-bridge unit in the three phases of a chain power regulating system; filtering ripples from the direct current side voltages; taking the direct current side voltages of which the ripples are filtered as feedback signals; calculating an average value of the three phases of the direct current side voltages based on the direct current side voltages; taking difference values between the three phases of the direct current side voltages and the average value as command signals; calculating an amplitude value and a phase angle of a negative sequence voltage according to the difference values by utilizing corresponding formulae; obtaining a required negative sequence according to an electric angle of a power supply voltage at a device grid place; and after the negative sequence voltage is superposed to an output voltage command used for power control in the device, driving the device to output an alternating current voltage so as to realize the balance control of the three phases of the direct current side voltages. The method of the invention has the characteristics of software implementation, simple algorithm, obvious effect and contribution to engineering application.

The present invention discloses a radio frequency (RF) reader grid and method for facilitating transactions. The RF reader grid includes a transponder, a RFID reader, and a host RFID reader in communication with a merchant system. The secondary and host RFID readers communicate with one another via wireless, RF frequencies. The present invention also discloses a wireless grid that comprises non-radio frequency readers, such as magnetic stripe readers. In addition, a method for using a secondary RFID reader to perform a transaction is disclosed. The method includes the steps of initializing the secondary RFID reader, communication transaction information using the secondary RFID reader and processing the transaction information using a host RFID reader.

The invention discloses a wireless underground miner positioning and construction area environment safety intelligent monitoring system. The system comprises a comprehensive processing server, a communication base station, an intelligent watch node, a positioning and monitoring node, a wind speed sensor node and a pressure sensor node. The comprehensive processing server can be in communication with the communication base station through connection of a cable. The communication base station is wirelessly connected with the intelligent watch node, the positioning and monitoring node, the wind speed sensor node and the pressure sensor node, and wireless mesh network communication is formed. According to the wireless underground miner positioning and construction area environment safety intelligent monitoring system, the positions of an underground miner can be positioned accurately, the vital signs of the miner and the safety information of the construction area environment of the miner can also be monitored, monitoring information can be transmitted to a ground monitoring center and the intelligent watch node on the hand of the underground miner in real time, operation and use are convenient, when the monitoring parameter exceeds the safety threshold value, the system can send out alarming information in time automatically, the positions of survived people can be determined after a mine disaster happens, the rescue efficiency can be improved, and the casualty loss can be reduced.

The embodiment of the invention discloses a wireless grid building method comprising the following steps: a first base station measures a sensing reference signal SRS sent by target user equipment UE so as to obtain a first uplink reference signal reception power RSRP, wherein the target UE refers to the UE in a service community to which the first base station is located; the first base station obtains the first emission power of the target UE sending the SRS; the first base station calculates the first uplink path loss of the target UE sending the SRS according to the first emission power and the first uplink RSRP; the first base station receives second uplink path losses sent by adjacent base stations; the first base station builds the wireless grid according to the first and second uplink path losses. The base station has much stronger receive and measuring ability when compared with the UE; normally the information sent by single UE can be received by a plurality of surrounding base stations, so the base station can obtain the UE uplink path losses so as to build the wireless grid with more accuracy, thus improving UE location positioning.

The embodiment of the invention discloses an intelligent equipment networking method, an intelligent equipment networking device and a system. The intelligent equipment networking method comprises the steps of: receiving wireless fidelity Wi-Fi hotspot information broadcasted by a control terminal or a wireless router; and performing networking according to the Wi-Fi hotspot information when the Wi-Fi hotspot information is received, and sending the Wi-Fi hotspot information to other intelligent equipment in a wireless mesh network where the networked intelligent equipment is positioned, so that the other intelligent equipment can be connected to the network according to the Wi-Fi hotspot information when the Wi-Fi hotspot information is received. The technical scheme provided by the embodiments of the intelligent equipment networking method, the intelligent equipment networking device and the system solves the technical problems of slow networking speed and low networking efficiency of the intelligent equipment in the prior art because the intelligent equipment is far from the control terminal or the wireless router and the speed of receiving the Wi-Fi hotspot information is slow or even the Wi-Fi hotspot information cannot be received, optimizes the existing networking technology of the intelligent equipment, and increases networking efficiency and success rate of the intelligent equipment.

The invention provides a method for making a peripheral circuit device grid in a flash memory, comprising the following steps: providing a semi-conductor substrate, wherein the semi-conductor substrate comprises a storage unit area and a peripheral circuit area; etching a shallow trench isolation structure of the storage unit area; etching a floating-gate polysilicon layer to form a floating gate and further form a stack grid for the flash memory; growing a first polysilicon layer; growing a medium layer; growing a second polysilicon layer; polishing the second polysilicon layer; removing the exposed medium layer; forming the grid of the peripheral circuit area by an etching process; and etching the surface of the shallow trench isolation structure in the peripheral circuit area before growing the first polysilicon layer. The invention has the advantage that using an etching method reduces the height difference between the oxide surface of the shallow trench isolation structure and the silicon active area of an adjacent area within the range of over-corrosion depth of a polishing process, and ensures to obtain the complete grid in a subsequent process.

The invention provides a wireless mesh network establishment method, apparatus and system of an electronic device system. The method is applied to an electronic device configured with a first wirelessmodule, and the method comprises the following steps: broadcasting own device information through the first wireless module, and receiving the device information of each electronic device from otherelectronic devices through the first wireless module; determining whether itself is a master electronic device or a slave electronic device according to the own device information, the device information of the other electronic devices and a preset rule; if the electronic device is the master electronic device, after a preset time or after preparation is ready, sending information related to networking parameters through the first wireless module, so that the other electronic devices join the network established by the master electronic device as slave electronic devices; and if the electronicdevice is the slave, detecting and obtaining the information related to networking parameters through the first wireless module to join the network established by the master electronic device. Therefore, the wireless mesh network between the electronic devices can be created automatically and flexibly without user operation.

The invention discloses a device and method for compensating gate leakage current of a MOS device, comprising: mirror circuit to output mirror voltage to a feedback control unit to generate mirror current, where the proportion of gate leakage current to mirror current is a mirror proportion parameter; compensation current unit to generate regulating current and compensation current to compensate the gate leakage current by the control of the control current outputted by a feedback control unit, where the proportion of compensation current to regulating current is a mirror proportion parameter; feedback control unit to respectively receive input voltage reference and mirror voltage coming from the junction of the mirror circuit and the compensation current unit and output control voltage to the compensation current unit according to the voltage reference and the mirror voltage, and regulate the regulating current of the compensation current unit according to the mirror current to make the regulating current equal to the mirror current.

The invention discloses a method and a system for identifying a wireless mesh network. The method comprises the following steps: an MP node selects an identified node as a father node when a new node is accessed into the network and the node is a grid node MP node; a solely marked safe passage exists between the father node and AC; the MP node identifies by using the father node as an identification point; an identification message is transmitted to the AC through the safe passage between the father node and the AC and then transferred to AS by the AC; in the same way, a return message of the AS is transferred to the father node by the AC through the safe passage; the MP node is identified; the identification information is simultaneously stored on the AC so as to identify the MP node for the second time. By adopting the method and the system which are disclosed by the invention, the problem that the access delay is increased because the identification mode adopted in the prior art is fussy is solved.

The invention provides a wind power plant grid-connection performance monitoring method. The method comprises the steps of acquiring equipment information and operation data of a wind power plant in real time based on a message bus; performing real-time monitoring on the grid-connection performance of the wind power plant based on the equipment information, the operation data and a pre-constructedgrid-connection performance evaluation system, wherein the grid-connection performance evaluation system comprises wind turbine generator grid-connection performance evaluation, reactive power compensation device grid-connection performance evaluation and whole station grid-connection performance evaluation. Real-time monitoring, analysis and evaluation are carried out through on-line measurementand calculation, the grid-connection performance is directly obtained, and technical support is provided for real-time supervision and optimized operation of the full-life-cycle grid-connection operation characteristics of the wind power plant. The method is simple, practical and easy to implement.

The invention relates to semiconductor technology, in particular to an MOS (metal oxide semiconductor) grid-control thyristor and a manufacturing method thereof. A cathode of a device is improved into a P-N junction two-layer structure comprising a P-type semiconductor base region and an N-type semiconductor source region. Compared with a conventional MGT (metal gate transistor) cathode P-N-P three-layer structure, the cathode P-N junction two-layer structure uses a double-diffusion process and is simple to manufacture and compatible with an IGBT (insulated gate bipolar transistor) manufacturing process. A device grid lower channel is an N-type channel with normally closed characteristics, extra negative voltage is not needed when the channel is closed, system complexity is reduced, and system reliability is enhanced. The invention is particularly applicable to the MOS grid-control thyristor and manufacture thereof.

The invention provides a grid structure forming method for semiconductor device of metal oxide, which comprises forming dielectric layer on the semiconductor underlay; forming polycrystalline silicon layer on the said dielectric layer; forming stack layer and positioning the grid location on the said polycrystalline silicon layer; etching the said polycrystalline silicon layer for the mask layer by the said stack layer to form grid; The invention can produce grid with good shape without forming the hard mask layer, which is especially applicable to grid making with characteristic dimension of line width under 65nm.

The embodiment of the invention discloses an intelligent equipment networking method, an intelligent equipment networking device and a system. The intelligent equipment networking method comprises the steps of: receiving wireless fidelity Wi-Fi hotspot information broadcasted by a control terminal or a wireless router; acquiring connecting state of other intelligent equipment in a wireless mesh network; and sending a connecting request to the wireless router according to the Wi-Fi hotspot information so as to be connected with the wireless router when the connecting state of the other intelligent equipment meets a preset condition. The technical scheme provided by the embodiments of the intelligent equipment networking method, the intelligent equipment networking device and the system solves the technical problem of unsuccessful networking of part of the intelligent equipment caused by connecting request congestion and low processing efficiency of the wireless router since intelligent terminals send connecting requests to the wireless router after receiving the Wi-Fi hotspot information in the prior art, ensures that the intelligent equipment can be connected to the network successfully, optimizes the existing networking technology of the intelligent equipment, and increases networking success rate of the intelligent equipment in an intelligent equipment system.

The invention discloses a power loop testing system for a power semiconductor device. The power loop testing system is provided with a control circuit, stabilized-voltage power sources, refrigerationdevices and tested-device driving circuits, wherein the stabilized-voltage power sources, the refrigeration devices and the tested-device driving circuits are controlled by the control circuit; the output ends of the stabilized-voltage power sources are connected with multiple detection sub-circuits; the detection sub-circuits are provided with current detecting resistors connected with the stabilized-voltage power sources, the current detecting resistors are connected with low-resistance switch devices controlled by the control circuit to be turned on and off in series, the low-resistance switch devices are connected with voltage diving resistors in parallel, the two ends of the current detecting resistors are connected with analog signal select circuits, and the output ends of the analogsignal select circuits are connected with voltage signal collecting circuits; the output ends of the voltage signal collecting circuits are connected with the control circuit; during testing, the tested-device driving circuits are connected with tested-device grids, the low-resistance switch devices are connected with tested devices in series, and the analog signal select circuits are also connected between the sources and the drains of the tested devices.

The invention provides a control apparatus, method, a storage medium and a device. The apparatus includes: a master-slave mode determining unit which is intended for determining whether a device is amaster device or a slave device; a first wireless communication unit which is connected to a router, and is intended for, if the device is a master device, receiving a first control command from a user through the router, wherein the first control command is intended for controlling the master device or the slave device; a second wireless communication unit which is intended for connecting to at least one device; and a control unit which is intended for, if the device is a slave device, determining whether the first control command that is received by the first wireless communication unit is aslave device control command, and if the first control command that is received by the first wireless communication unit is a slave device control command, forwarding the first control command to a corresponding slave device through the second wireless communication unit. According to the invention, the technical solution can remote control the device through wireless network technology, and canbring any two devices into wireless communication.

The invention discloses a preparation method for a VDMOS integrated ESD structure, and the method comprises the steps: forming an epitaxial layer on a substrate; depositing a silicon nitride layer on the surface of the epitaxial layer, presetting a grid region or a terminal as an ESD region through employing the photoetching technology and the dry etching technology, etching the ESD region, enabling the epitaxial layer to be exposed in a part of the region, and enabling the remaining region to be still covered by the silicon nitride layer; growing a field oxide layer in the region where the epitaxial layer is exposed through the boiler tube technology; carrying out the wet etching of silicon nitride layer, and keeping a field oxide pattern; forming a trench in an active region; forming MOSFET device gate oxide; depositing polycrystalline silicon; forming polycrystalline silicon patterns of a device grid and an ESD PN junction; forming a P well; completing the junction injection of the PN junction on the ESD polycrystalline silicon pattern while forming a device source electrode, and forming an ESD; depositing a medium; forming a lead wire hole; completing hole tungsten filling and surface metal technology, and forming a device front structure; and finally forming a final device structure. The method avoids the loss of an active region epitaxial layer in the growth of a thermal oxidation layer, and increases the withstand voltage of a device.

The invention provides an emergency communication command, positioning and sensing system. The system comprises communication base stations, wireless communication terminals, wireless sensors, positioning tags and a server. The communication base stations and the wireless sensors provide wireless grid network networking and signal coverage for the system. A broad-band wireless local area network is formed among the communication base stations and broad-band wireless access is provided. A narrowband sensing network is formed among the wireless sensors and narrow-band wireless access is provided. IPV6 / 6Lowpan protocol networking is used between the communication base stations and the wireless sensors. The server is connected with any one communication base station. Each wireless communication terminal accesses the communication base stations through the broad-band wireless local area network. Each positioning tag communicates with the communication base stations or the wireless sensors through the narrowband sensing network. The server issues monitoring information to the wireless sensors and the positioning tags through the communication base stations. By using the emergency communication command, positioning and sensing system provided in the invention, a narrow-band low-power-consumption advantage and a broad-band wireless communication capability of a sensing network are possessed simultaneously.

The invention discloses a manufacturing method of a self-alignment low-voltage super-junction MOFET. A terminal region deep trench formed on n-type epitaxy surrounds an active area deep trench; field oxides grow on the bottom sand the side walls of the deep trenches; primary polycrystalline silicon deposition is carried out; etching is carried out till polycrystalline silicon is flush with the upper surface of an epitaxial layer; secondary polycrystalline silicon deposition is carried out; secondary polycrystalline silicon dry method back etching is carried out to form a shallow slot MOSFET device grid; a P trap is formed; a high-thickness oxidation layer is formed, and the oxidation layer is removed; a device active area is manufactured; contact hole etching is carried out, a light resistor of the whole active area of a small cell area is switched on, a light resistor of a terminal hole demand area is switched on, and small cell area self-alignment hole etching is carried out; ohmic contact is formed through contact hole etching injection, and finally the structure is completed. On the premise of keeping the process cost unchanged, the area of a source area and a single cell can be reduced, and the whole chip area can be reduced.

The invention discloses a reactive voltage control method for improving voltage qualified rate of a wind power plant. The reactive voltage control method for improving the voltage qualified rate of the wind power plant includes steps that S1, acquiring the real-time data and running state information of a fan and a reactive compensation device in the wind power plant and the real-time electrical quantity information of a booster station; S2, calculating the reactive voltage sensitivity of the fan end in the wind power plant, the reactive voltage sensitivity of a reactive compensation device grid-connected point and the reactive voltage sensitivity of a booster station grid-connected point of the wind power plant; S3, calculating the control error of the fan and the reactive compensation device according to an executed reactive voltage control target and the corresponding actual reactive value; S4, analyzing and calculating the reactive voltage control targets of the fan and the reactive compensation device; S5, compensating the reactive voltage control targets; S6, obtaining safety control targets; S7; outputting the safety control targets to control units of the fan and reactive compensation device to control targets; S8, returning to the step S3. The reactive voltage control method for improving the voltage qualified rate of the wind power plant is good for improving the voltage regulation qualified rate of an automatic voltage control system of the wind power plant.