407results about How to "Fast transfer rate" patented technology

The invention discloses an aviation laser communication system which mainly aims to settle a problem that aviation communication is restricted by frequency spectrum and bandwidth. The aviation laser communication system comprises the components of a satellite-borne system which comprises an optical transmitter-and-receiver and an electric control cabinet; a plane-borne system which comprises an optical transmitter-and-receiver, an electric control cabinet, a bracket for mounting, and a radome which sleeves the whole plane-borne system; and a ground system which comprises an optical transmitter-and-receiver and an electric control cabinet. The plane-borne system realizes bidirectional laser communication between the plane-borne system and the ground system. The optical transmitter-and-receivers of the satellite-borne system, the plane-borne system and the ground system respectively comprise a communication transmitting module, a communication receiving module, a capturing aiming tracking module and an optical antenna. The light which is transmitted from the communication transmitting module passes through the capturing aiming tracking module and is transmitted through the optical antenna. The light which is received by the optical antenna passes through the capturing aiming tracking module, the light is received through the communication receiving module. The capturing aiming tracking module realizes establishing and keeping of a laser communication link with the corresponding optical transmitter-and-receiver.

A preparation method of a carbon coated vanadium sodium phosphate positive electrode material comprises the steps: with glucose as a reducing agent and a carbon source and water as a dispersant, carrying out ball milling of NH4VO3, NaH2PO4.2H2O and glucose in water, carrying out spray drying, calcining, and thus obtaining the carbon coated vanadium sodium phosphate positive electrode material. The method has the advantages of low synthesis temperature, simple steps, easily obtained raw materials, and advantageous industrialization; the obtained carbon coated vanadium sodium phosphate positive electrode material has a structure with uniform primary particles, has the particle size of 100-200 nm, and has the characteristics of short sodium ion diffusion distance, fast transmission speed, high specific surface area, high electrical conductivity and fast ion transmission and the like. The obtained carbon coated vanadium sodium phosphate positive electrode material is assembled into a battery; in a voltage scope of 2.0-3.75 V and under 1 C multiplying power, the highest first charge and discharge capacity per gram can reach 93.5 mAh*g<-1>, the capacity retention rate can be up to 97.7% after cycling for 50 circles with the 1C multiplying power, and excellent electrochemical performance is showed.

A method for up-grading computer software includes unloading data required by software up-graidng and up-grading software at service end, broadcasting a note on local net to notify that there is newest data for software up grading at service end; noticing the note by client end and repending back to service end; forming multicast group to multicast upgrading data from service end to client end; obtaining data and up-grading software at client end.

The invention provides an auto-management data link of micro unmanned aerial vehicles, which comprises a physical medium which is 2.4 to 2.483GHz microwaves, a link protocol which is ZigBee protocol is an international standard IEEE802.15.4-based wireless network protocol, and equipment formed by connecting a micro unmanned aerial vehicle model with a wireless module and an antenna, which are fixedly arranged in the unmanned aerial vehicle model, through a serial port RS-232. The wireless module consists of a ZigBee coordinator and a ZigBee router and adopts a half duplex communication mode; a data link network topology is a tree topology; and data link simulation software is the 14.5 edition of OPNET network simulation software. The data link allows the transmission speed of the unmanned aerial vehicles to reach 250kbps; the channel utilization rate can reach 90 percent; the packet transfer delay is 0.4s; and the throughput of the data link is 63kbps.

The invention discloses an Internet of Things intelligent irrigation system based on cloud computing. The system comprises an intelligent irrigation cloud service platform, an intelligent irrigation cloud data center, an Internet of Things terminal management controller, and an irrigation device, the irrigation device and a sensor are both connected with the Internet of Things terminal management controller, the Internet of Things terminal management controller is connected with the intelligent irrigation cloud data center via a wireless network, a user logs in the intelligent irrigation cloud service platform for obtaining service via the network, the intelligent irrigation cloud service platform is deployed in the intelligent irrigation cloud data center, and the intelligent irrigation cloud service platform provides service for the user. According to the system, the conception is novel, advanced cloud computing, the Internet of Things, big data, mobile application, and the artificial intelligence technology are employed, the system is simple, easy, and convenient, the timeliness is good, the networking is convenient, the reliability is high, the transmission rate is fast, and the advanced Internet of Things intelligent irrigation system based on cloud computing is provided for the application and promotion of the technologies of cloud computing and Internet of Things in the water conservancy industry.

The invention discloses a system and method for parking lot induced parking and/or reverse vehicle seeking. The system of the invention comprises a UWB vehicle positioning system, a mobile terminal and a remote networking system which is in communication connection with the UWB vehicle positioning system and the mobile terminal; the positioning system comprises a UWB electronic label arranged on the vehicle, a plurality of UWB base stations arranged in the parking lot at intervals, a processing device for determining vehicle position information according to a parameter value obtained by the WUB base station, and a monitoring service system for storing position information of the vehicle and/or an idle parking space. The method of the invention comprises: each base station receives a wireless positioning signal transmitted by the UWB electronic label and a corresponding parameter value of the wireless positioning signal is obtained; the parameter value is utilized to determine position information of the vehicle and/ or the idle parking space and the position information of the vehicle and/ or the idle parking space are stored in the monitoring service system; when a remote networking system receives an order for seeking a vehicle or inquiring an idle parking space from a mobile terminal, the position information of the corresponding vehicle or the idle parking space is called to be transmitted to the mobile terminal. The system and method have advantages of fast speed, high accuracy and stability.

The invention discloses a low-voltage power line bandwidth carrier concentrator, which consists of a hardware structure and a software structure, wherein the hardware structure consists of a micro controller unit, a data storage unit, an electric quantity storage unit, a power line network bridge communication unit, a GPRS communication unit and a power supply module unit; and the software structure consists of a system scheduling module, a power line network bridge module, an RS485 driving module, a GPRS wireless communication module, and an embedded database module. In the invention, embedded design is adopted, embedded micro controller technology, bandwidth power line carrier technology, GPRS wireless communication technology, embedded database technology, multipath I/O multiplexing technology and the like are integrated, and the GPRS communication module can receive a remote meter reading instruction transmitted by a management center on site, read user electric quantity data, and sends user electric quantity data to the management center through the GPRS communication module. The concentrator is simple in operation and convenient to use and has a high application value and a promising application prospect in the technical field of remote meter reading of a power system.

The invention relates to a non-enzyme electrochemical transducer for detecting the glucose content on the basis of graphene/nanogold modified electrode (Gr-Au/GC). According to the non-enzyme electrochemical transducer for detecting the glucose, chloroauric acid (HAuCl4) and graphene (Gr) are used for preparing a modified electrode, the prepared modified electrode is extremely highly active on oxidation of the glucose, highly dispersed nanoparticles in the modified electrode provide large superficial area for electro-catalysis reaction, the detection sensitivity is improved, the electron transfer rate is increased, and analysis performance of the glucose is improved. According to the non-enzyme electrochemical transducer for detecting the glucose, the detection sensitivity of the glucose is high, the detection limit is low, and the detection range is wide.

The invention relates to a low-temperature electrolyte for LiFePO4 (lithium iron phosphate) lithium-ion batteries, belonging to the technical field of low-temperature electrolytes for lithium batteries. The electrolyte comprises dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, ethylene carbonate, a film-forming additive and lithium polyoxometallate, wherein the lithium polyoxometallate refers to lithium phosphomolybdate Li3PMo12O40, lithium phosphotungstate Li3PW12O40, lithium silicotungstate Li4SiW12O40 or lithium silicomolybdenate Li4SiMo12O40. For solving the problems that in the prior art, the lithium ion transport of an electrolyte is blocked, slow in speed and low in efficiency and the electrolyte is poor in low-temperature performance, the invention provides a novel fluoride-free low-temperature electrolyte for LiFePO4 lithium-ion batteries; and by taking the non-fluoride lithium polyoxometallate with a three-dimensional skeleton structure as an electrolytic lithium salt and selectively adopting a low-viscosity carbonate solvent, through optimized proportioning, the migration rate of lithium ions is increased, and the low temperature properties of LiFePO4 batteries can be significantly improved.

The invention discloses a cloud computing-based intelligent household appliance energy-saving control system. The system comprises a sensor plate, a smartphone and a cloud computing platform, wherein the sensor plate is used for executing household appliance information collection and work control; the smartphone is used for processing and displaying household appliance information and outputting a household appliance control signal; wireless communication connection between the sensor plate and the smartphone is realized through the cloud computing platform; the cloud computing platform comprises a communication server, a data storage unit, a cloud computing processing unit and a GIS (Geographic Information System) server; a data port of the cloud computing processing unit is connected with the data ports of the GIS server and the communication server; a signal output end of the cloud computing processing unit is connected with a signal input end of the data storage unit. According to the system provided by the invention, the smartphone is connected to the cloud computing platform to realize intelligent control and information acquisition on an intelligent household appliance, so that the system has the advantages of high communication transmission speed, high communication quality, low power consumption and low cost.

The invention belongs to the field of preparation of materials for lithium ion batteries, and particularly discloses a lithium iron phosphate composite material with high compaction density and a method for preparing the lithium iron phosphate composite material. The lithium iron phosphate composite material is of a core-shell structure. Cores are made of lithium iron phosphate and graphene dopedin the lithium iron phosphate, and shells are made of inorganic lithium salt and carbon and nitrogen complexes. The method includes preparing lithium iron phosphate precursors; adding graphene oxide solution into the lithium iron phosphate precursors and preparing graphene/lithium iron phosphate precursors by means of hydrothermal reaction, low-temperature drying and thermal reduction; depositingthe lithium salt and organic carbon and nitrogen sources on the surfaces of the graphene/lithium iron phosphate precursors by the aid of electron beam evaporation processes and chemical gas-phase processes. The lithium iron phosphate composite material and the method have the advantages that the compaction density of the lithium iron phosphate composite material can be improved by the aid of the lubrication performance of the graphene, the ion and electron transport rates of the lithium iron phosphate composite material under the high-rate condition can be increased by the aid of the characteristic of the ionic conductivity of the lithium salt of the shell and the electron conductivity of the carbon and nitrogen sources, and the rate performance of the lithium iron phosphate composite material can be improved.

The invention relates to lithium metallic oxide precursor material with an annual ring type structure, an anode material prepared by the lithium metallic oxide precursor material, and a preparation method and application, and in particular to the lithium metallic oxide precursor material for a lithium ion battery and a preparation method of the lithium metallic oxide precursor material, and the anode material prepared by the lithium metallic oxide precursor material, the preparation method and the application. The invention aims to solve the problems of small discharge capacity, poor circulating performance and low tap density of a common lithium metallic oxide anode material. According to the lithium metallic oxide precursor material with the annual ring type structure, the anode material prepared by the lithium metallic oxide precursor material, and the preparation method and the application, disclosed by the invention, the solid-to-liquid ratio of a solution in a coprecipitation reaction process is controlled to be in periodic linear variation in rear time by using an intermittent equivalent overflowing way; the prepared lithium metallic oxide precursor material and the anode material prepared by the lithium metallic oxide precursor material are used in the field of batteries.

The invention relates to a method of a lithium vanadium phosphate-coated ternary material of a lithium ion battery. The active electrode material of lithium vanadium phosphate is used as a coating material, and can form a uniform coating layer at the surface of the ternary material. A preparation method comprises the following steps of (1) preparing the ternary material; (2) mixing the ternary material and the lithium vanadium phosphate; (3) calcining a mixed sample under the reduction atmosphere. The method has the advantages that the transmission rate of lithium ions of the surface-coated lithium vanadium phosphate material is quick, and the large rate property of the material is improved; the lithium vanadium phosphate material has good stability, the erosion of electrolyte to the ternary material of an inner core is effectively inhibited, the coated ternary material integrates the advantages of the ternary material and the lithium vanadium phosphate, and the good rate property and cyclic property are realized.

A ZigBee and LED visible light communication based system of Internet of things, includes: actual things in the system of Internet of things, a sensing module, a central information system, and a distributed system and open computer network; the system also includes: a ZigBee communication module, a LED visible light communication module, and a plurality of RFID smart tags. The actual things are provided with the RFID smart tags. The sensing module communicates with the RFID smart tags, and then communicate with the ZigBee communication module though a partial node, a key point and a main line, and the ZigBee communicates with the LED visible light communication module, and the LED visible light communication module communicates with the central information system which communicates with the distributed system and open computer network.

The invention relates to the technical field of drilling data transmission devices and using methods thereof, in particular to a device for sound wave transmission of while-drilling bottom pressure data and a using method thereof. The device for sound wave transmission of while-drilling bottom pressure data comprises a short drill collar, a sound wave transmission outer cylinder, a while-drilling pressure measuring outer cylinder, a battery housing, an instrument bay cylinder and a central spindle. The device for sound wave transmission of while-drilling bottom pressure data is reasonable and compact in structure and convenient to use. When pressure and temperature data obtained by a pressure and temperature integrated sensor is transmitted to the ground, stress waves are generated by a piezoelectric ceramic transducer and transmission of downhole data is achieved, and the data transmission mode has the advantages that the interference resistance is strong and the transmission rate is high, so that the device for sound wave transmission of while-drilling bottom pressure data is not limited by circulation media adopted by unbalanced drilling, signals are normal and are transmitted in real time, and the device is applicable to transmission of downhole data of conventional unbalanced drilling.

The invention relates to a mobile-phone PDA direct broadcasting system based on android. The system is characterized in that: a mobile phone terminal acquires a communicable PDA terminal list through a common network server; a sending terminal takes one terminal in the obtained list as a receiving terminal of video data and sends a connection request to the terminal; if the receiving terminal agrees to receive, a included camera is started, the video data is collected in real time and the collected video data is sent to a coding interface module; on a coding interface, a H264 algorithm is used to carry out video coding on the collected video data and the data is sent to an RTP sending module; the RTP sending module is used to send a data frame to a target PDA terminal; in an RTP receiving module, the receiving terminal decodes and plays the data frame. Compared to other systems, by using the system of the invention, real-time performance is high; a transmission rate is fast and the system can be used in different network environments.

The invention discloses a method for upgrading equipment in a mesh network. The method includes the following steps: S1, taking a father node of a node to be upgraded as an initial query node, and receiving an upgrade request sent by the node to be upgraded and firmware information required for the upgrade; S2, when the query node includes upgrade firmware, enabling the node to be upgraded to obtain the upgrade firmware from the query node; S3, when the query node does not include the upgrade firmware, enabling the query node to query the firmware information of a child node in a mesh sub-network of the query node; and S4, when the query node finds the child node including the upgrade firmware in the mesh sub-network of the query node, acquiring the upgrade firmware from the child node; and when the query node cannot find the child node including the upgrade firmware in the mesh sub-network of the query node, enabling the query node to send the upgrade request and the firmware information required for the upgrade to the father node, and circularly performing the step S2. According to the scheme of the invention, the new firmware can be obtained nearby, and once the network scale becomes larger, the depth becomes deeper, the effect becomes more obvious, and the network upgrade time can be greatly saved.

The invention relates to method for preparing a functionalized composite nano-fiber modified electrode. The method specifically comprises the steps of (1) preparing a spinning solution; (2) preparing composite nano-fibers through electrostatic spinning so as to form a composite nano-fiber PA6-MWNTs modified electrode; (3) carrying out electrical-polymerization thionine functionalization on the composite nano fibers: soaking the composite nano-fiber PA6-MWNTs modified electrode into a polymerization solution containing thionine monomers PTH, applying a voltage to the modified electrode so as to carry out anodizing treatment, then, carrying out cyclic volt-ampere scanning, washing away the thionine monomers, adsorbed to the modified electrode, by using a phosphate buffer solution PBS, forming a functionalized composite nano-fiber electrode modification material PA6-MWNTs/PTH layer on the surface of the electrode after the polymerization reaction is ended, thus obtaining the functionalized composite nano-fiber PA6-MWNTs/PTH modified electrode. According to the method, a functionalized composite nano-fiber electrode modification material which has the characteristics of good stability, large specific surface area, good biocompatibility, high electron transfer rate, uniformly-distributed diameter and pore size, and the like is obtained.

The invention provides an automobile hybrid electric system based on FlexRay buses, aiming to solve the problem of limitations of an automobile hybrid electric system based on a controller area network (CAN) bus. The system comprises a FlexRay bus A and a FlexRay bus B, wherein the FlexRay bus A is respectively connected with an engine controller module, a transmission case controller module, a braking controller module, an entire automobile control module and a diagnosis interface module through the FlexRay network nodes of the modules; and the FlexRay bus B is respectively connected with an automatic clutch controller module, a motor controller module, a battery management system module, the entire automobile control module and the diagnosis interface module through the FlexRay network nodes of the modules. Since the FlexRay buses are used for the connection of the system provided by the invention, the bandwidths of the FlexRay buses are large, the transmission speed is fast, the system can be used as a dual-channel system to operate, the hardware cost can be saved during design, and the system is more suitable for vehicles.

The invention relates to the technical field of electric power systems, and provides a high-voltage power transmission iron tower antitheft system. An object of the invention is to satisfy the requirements for the high-voltage power transmission iron tower antitheft system to monitor the abnormal state of a power transmission iron tower. A multifunctional detection device acquires a vibration signal of the power transmission iron tower, determines whether an abnormity occurs or not according to the vibration signal, and if so transmits a warning signal to a remote monitoring server. A wireless video monitoring subsystem acquires pictures or videos of the vicinity of the power transmission iron tower, and transmits the pictures or videos to the remote monitoring server. The remote monitoring server displays the warning signal and the pictures or videos, judges the received pictures or videos to determine whether the iron tower is artificially damaged or not in the pictures or videos, and if so transmits a control command to the wireless video monitoring subsystem to command the wireless video monitoring subsystem to record pictures or videos again. The high-voltage power transmission iron tower antitheft system provided by the invention is applicable to electric power system monitoring.