190 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.

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 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 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 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 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 method for constructing networking based on network device and a network system. The method comprise: a main device obtaining a device list, and the device list recording device information of at least one device which is allowed to access a network; the main device selecting the communication channel meeting a first preset condition according to the detected state of at least one communication channel; and the main equipment creating a network according to the selected communication channel and network identifier, and the network identifier being used for uniquely representing the identifier of the main equipment. According to the method, the technical problems that the current wireless grid network device networking generally adopts point-to-point configuration of network parameters, the network parameters are too complicated, the configured wireless grid network parameters are fixed, and an optimal working communication channel cannot be automatically selected along with the current environment are solved.