642 results about "Real time data transmission" patented technology

The invention relates to a real-time data distribution system with a distributed network architecture and a working method thereof, the system adopts a publication / subscription communication mechanism to transfer information in Internet and a mobile network, and the system comprises a server sub-system, a proxy sub-system, a terminal sub-system and a distributed database, wherein, the server sub-system is used for completing the operations of topic storage, topic matching and the like; the proxy sub-system is used for completing the operations of receiving a topic from a terminal, transmitting a matching event to a subscriber, submitting the publication / subscription topic and the like; the terminal sub-system is used for completing the publication / subscription information of a user; and a distributed database which is used for storing the publication / subscription information and the system information. The system can automatically, quickly and safely provide real-time data transmission service against the subscription information of the user, provide the publication / subscription service of a variety of types of data, such as text information, streaming media, geographic position information and the like, provide up to 20 QoS control parameters, realize the QoS hierarchy configuration of an application layer and provide the convenience for function expansion of the data distribution system.

A system for detecting and graphically displaying a contents of a fast-moving target object comprises: a radiation source, having a position such that at least a portion of radiation emitted from the radiation source passes through the fast-moving target object, the fast-moving target object having a variable velocity and acceleration while maintaining a substantially constant distance from the radiation source and being selected from the group consisting of: a vehicle, a cargo container and a railroad car; a velocity measuring device configured to measure the variable velocity of the fast-moving target object; a detector array comprising a plurality of photon detectors, having a position such that at least some of the at least a portion of the radiation passing through the target object is received thereby, the detector array having a variable count time according to the variable velocity and a grid unit size; a counter circuit coupled to the detector array for discretely counting a number of photons entering individual photon detectors, the counter circuit measuring a count rate according to a contents within the fast-moving target object; a high baud-rate interface coupled to the counter circuit for sending count information from the counter circuit at a rate fast enough to support real-time data transfer therethrough; and a processor coupled to the velocity measuring device and to the high-baud-rate interface, receiving count information from the high baud-rate interface and generating distortion-free image data in real time as a function of the count information and the variable velocity. A method for using the system is also disclosed.

A bidirectional communication method allowing real-time information sharing among clients on an Intranet through a server on the Internet in disclosed. After establishing two connections between the server and the client through an HTTP proxy, one of the two connections is set to a downstream connection using GET method of HTTP to allow real-time data transfer from the server to the client. Thereafter, the other of the two connections is set to an upstream connection using POST method of HTTP to allow real-time data transfer from the client to the server. After having set the upstream connection and the downstream connection, data cells are transferred between the server and the client through the upstream connection and the downstream connection.

The invention is suitable for the video technologic field, providing a video transmitting method, an embedding monitoring terminal and a monitoring platform server. The video transmitting method comprising the following steps: the transmission control protocol server terminal to the corresponding commands to send video requests; terminal through the transmission control protocol server receives a request to send the video instructions; terminal in accordance with the request received video instruction, the use of User Datagram Protocol to the server to send the corresponding video data; server User Datagram Protocol to receive data terminal to send the video. In this invention, the terminal with the server using the TCP Transmission Control Protocol command, using UDP protocol the corresponding video data transmission, the realization of a video transmission method, to ensure that the control commands is not easy to lose and video real-time data transmission on the network performance requirements of the stability of the low bandwidth requirements of small, making a small video image transmission delay, high fluency.

Provided is a system and method for broadcasting stereoscopic video data to users on the Internet based on Moving Picture Experts Group (MPEG)-4. The system includes: an encoding server for receiving stereoscopic video data, audio data, and Object Descriptor / Binary Format for Scene (OD / BIFS), which is information for controlling a content, and encoding the data into elementary stream (ES) having an MPEG-4 structure; a web server for receiving from the client any one among two-dimensional video display mode, field-shuttering video display mode and frame-shuttering video display mode; and a streaming server for generating a RTP (RTP) packet for real-time data transmission on the Internet by multiplexing the ES based on the display mode inputted into the web server, and transmitting the RTP packet to the client.

The invention discloses a wireless sensor network signal synchronous acquisition and on-time and real-time transmission method; wireless nodes in a wireless sensor network are divided into three kinds: a central node, a trunking node and a wireless sensor node, wherein, the central node is connected with a computer of a detection center for data transmission between the network and the computer; the trunking node and the central node are combined to a multi-hop chain type topological structure to realize a data long-distance transmission network; according to the information received from the trunking node, the wireless sensor node selects to join to a detecting unit controlled by a certain trunking node in order to send the own acquired data to the trunking node. In addition, the wireless sensor network adopts vibration signals to sample an initialization mode before the beginning and sample an on-time and real-time data transmission mode after the beginning. The wireless sensor network is characterized in low power consumption, large distribution range, timely and accurate detecting signal transmission, etc., and is suitable for wide popularization in the field of large-scale civil structure vibrating state detection.

The invention provides a descriptor-based PCIE bus DMA controller and a data transmission control method, includes TLP sending engine, TLP receiving engine, interface access control module, DMA transfer control module, descriptor access control module, multi-DMA channel control module, control status register and DMA channel buffer. The DMA transfer process of the DMA controller designed by the invention is completely controlled by a descriptor, and the data bandwidth and the transfer efficiency are improved. DMA data transmission can configure multiple DMA channel, and that priority of each DMA channel, the transmission triggering threshold and the timeout time are programmable, so that the data transmission can be carry out according to the high and low priority, and the real-time data transmission of the specific channel can be guaranteed; The upload / download data buffers of all DMA channels can be dynamically managed to achieve multi-channel DMA multiplexing and ensure the efficiency of DMA transfer bandwidth.

A method for effectively implementing real time multimedia data transmission in an Ethernet network that operates in a CSMA / CD (Carrier Sense Multiple Access / Collision Detect) scheme. Real time data gets priority over general data, and uses an MPCP (Multi-Point Control Protocol) of the IEEE 802.3ah EPON to prevent a collision from occurring in real time data transmission, and also prevents delay time variation. An RT-IFG (Real Time Inter-Frame Gap) is defined for real time data, shorter than an IFG, to give priority to the real time data over general Ethernet data. The MPCP is used for transmission of real time data without collision between the real time data.

The invention discloses a circuit structure utilizing a mobile phone APP, a cloud platform and a Bluetooth intelligent key control switch lock and an implementation method of the circuit structure, and mainly aims to solve the technical problems that in the prior art, an intelligent key cannot realize real-time monitoring and real-time data transmission and management and has large potential safety hazards. The circuit structure disclosed by the invention has the advantages of integrated binding of uniqueness of an ID address of an intelligent lock core, the uniqueness of the ID address of the intelligent key, the uniqueness of a mobile phone number and a mobile phone identification code and the uniqueness and comprehensive binding of a mobile phone APP account and a password, so safer and more reliable use is realized, and the possibility of cracking is prevented. Moreover, during unlocking every time, the cloud platform is needed for connection authentication so as to obtain an unlocking authority; after unlocking, the unlocking record data is uploaded in time; the authorization and data updating are more convenient and quicker. Meanwhile, the circuit structure disclosed by the invention is connected with a cloud platform system by a mobile phone network and is not affected by regions or environment.

The invention discloses a bullet train state monitoring system and a multifunctional hybrid gateway thereof. The multifunctional hybrid gateway comprises a field bus communication module, a wireless communication module, an Ethernet communication module, a main controller, a storage circuit and a real-time clock circuit, wherein the main controller is connected with the field bus communication module, the wireless communication module and the Ethernet communication module and used for performing protocol conversion and data processing on interactive data of the field bus communication module, the wireless communication module and the Ethernet communication module. The multifunctional hybrid gateway disclosed by the invention can realize the functions of protocol conversion, network transmission, data fusion and the like, and has the advantages of combining wired transmission with wireless transmission and real-time data transmission with high-capacity data transmission.

A handover method and apparatus are provided. The handover method of a mobile station (MS) moving from a network of a first access point (AP) to a network of a second AP includes scanning the second AP through a specific channel according to a handover history registered in the MS; and associating the MS with the second AP according to a result obtained from the scanning. Accordingly, a time delay occurring in the process of scanning an AP is minimized, thereby avoiding data loss of a service requiring real-time based data transmission.

The invention discloses a data transmission method, a system and a device thereof. The method comprises the following steps: a streaming media server receives a data packet from a coder and carries out cache; the information of data transmission flow forecasted by the coder is obtained; according to the size of the received data packet, the information of data transmission flow of the coder and the real-time code rate of an output channel, the transmission time of the data packet is determined or / and the data transmission speed is adjusted; data is transmitted according to the determined transmission time or / and transmission speed. The invention also discloses the corresponding system and the device. By using the method, the system and the device of the invention, the smooth data transmission flow is realized, the requirement for real-time data transmission of direct broadcasting service is met and good direct broadcasting effect is achieved.

The invention relates to a wireless image transmission communication system for an unmanned aerial vehicle and a wireless image transmission communication method. The wireless image transmission communication system comprises a digital camera, a control module and a power module, and is characterized in that the wireless image transmission communication system further comprises a wireless communication module for real-time data transmission with a ground monitoring center, the wireless communication module comprises a reconfigurable high-speed digital modulation unit and a digital transmission transmitter, the reconfigurable high-speed digital modulation unit is used for selecting a digital modulation mode to digitally modulate serial data stream according to the modulation mode of a remote control command of the ground monitoring center, the digital transmission transmitter is used for transmitting data by the aid of microwaves, and the reconfigurable high-speed digital modulation unit comprises a series-to-parallel portion, a sampling control portion and a carrier wave multiplication portion. By adding the reconfigurable multi-mode modulator, modulation modes can be changed in an online manner according to the quality of a signal channel environment, and high-resolution image data can be transmitted in real time even in a severe transmission environment.

The invention provides a solar photovoltaic system, which comprises a plurality of alternating current photovoltaic components, a data processing module and a system analysis module, wherein the plurality of alternating current photovoltaic components are mutually connected in series for constituting an alternating current photovoltaic component string to generate alternating current according tosolar energy; the data processing module is connected with the alternating current photovoltaic component string and used for acquiring power parameters of all the alternating current photovoltaic components through power line communication technology and detecting and identifying abnormality or a fault in the solar photovoltaic system; and the system analysis module is connected with the data processing module and used for collecting system data from the data processing module and storing, analizing, drawing or displaying the system data. The invention further provides a fault detection method of the solar photovoltaic system. Through the way of monitoring real-time data transmission between all the alternating current photovoltaic components and the data processing module, when the fault occurs in the photovoltaic system, the generation of the fault can be timely detected, and the position and the type of the fault can be further identified, thereby enabling maintenance staff to repair the fault as soon as possible and reducing the impacts on normal power generation.

Signals in a multi-channel, impaired communication system are post-processed at the receiver. A triangular matrix Decision Feedback Demodulator (DFD) at the receiver extracts channels without requiring delivery of receiver parameters to the transmitter. Multi-Input Multi-Output (MIMO) processing matrices and DFD parameters are computed by first applying matrix transformations to diagonalize the noise covariance matrix of the multiple channels received at the receiver. QR decompositions (i.e., decompositions into orthogonal and triangular matrices) are then applied to the main channels to obtain triangular channel matrices. The noise-diagonalizing transformations and QR decompositions are then combined to form the MIMO postprocessing matrices and DFD parameters. MIMO postprocessing matrices and DFD parameters are computed from training data and then adapted during live data transmission.

The invention provides a data transmission system based on a multipath heterogeneous one-way transmission channel. The system comprises a sending end and a receiving end, both of the sending end and the receiving end are realized by adopting five-layer system architecture, the five-layer system architecture comprises a management layer, a service layer, a scheduling layer, a link layer and a transmission channel layer, and the transmission channel layer comprises a sending end control unit, a multipath one-way non-feedback transmission channel and a receiving end control unit. The algorithm provided by the invention does not depend on specific hardware technology, is applicable to all kinds of heterogeneous one-way transmission channels, can dynamically adjust the number of the transmission channels, has flexible expansibility and wide adaptability, can realize multichannel data one-way transmission and meets the needs of real-time data transmission, in the case of a fault of the transmission channel, the transmitter and the receiver can timely discover and remove the problems in time to ensure the transmission reliability.

The embodiment of the invention discloses a routing policy information generating method and device and a routing method and device. The routing policy information generating method comprises the steps that a low-orbit satellite constellation system supporting inter-satellite link transmission is selected; the earth's surface is divided into physical areas of set number and set size; a logical area is divided for the low-orbit satellite constellation system; a static area position relation table is established and stored in NCC; and according to constellation ephemeris data, a dynamic satellite area mapping table is established and stored in the NCC and each satellite of the low-orbit satellite constellation system. According to the method provided by the embodiment, the existing satellite networking routing policy is optimized, so that the existing low-orbit satellite constellation system can realize fast and real-time data transmission of most of services on the ground without equipping IP equipment and crossing a satellite layer.

The invention discloses a self-generating intelligent flowmeter and a flow real-time wireless self-monitoring system, wherein the self-generating intelligent flowmeter comprises a shell, a self-generating device, an energy storage battery, a flow inductor which monitors the liquid flow, an antenna, and an intelligent control device which sends the flow data monitored by the flow inductor to a central server through the antenna; the self-generating device comprises an impeller, a rotary magnet housing and a fixed coil, a lateral liquid channel and an electronic control room are arranged in the shell, the two ends of the lateral liquid channel are respectively a liquid inlet and a liquid outlet, a fluid switch is arranged in the lateral liquid channel, and the impeller is rotatably installed in the lateral liquid channel through an impeller shaft on the impeller; the rotary magnet housing covers the fixed coil, and the bottom of the rotary magnet housing is fixedly arranged on the impeller shaft; and the flow inductor is arranged in the electronic control room. The invention can realize real-time data transmission, and can be self-powered.

The invention discloses a real-time data transmission method and system based on the Internet of Vehicles, and relates to the field of information transmission. The method comprises the following steps: S001, a T-box control unit sends a request command to an engine ECU through a CAN communication bus; S002, the engine ECU sends state feedback to the T-box after receiving the message; S003, the T-box performs processing on the collected data in a preprocessing mode and storing the same; S004, the data are uploaded to an Internet of Vehicles TSP platform through incremental detection and data compression; and S005, a mobile terminal acquires the information of the Internet of Vehicles TSP platform through the Ethernet and displays the information. According to the real-time data transmission method and system, vehicle data communication connection and communication are performed through the CAN communication bus, the T-box collects vehicle control information and positioning information, key and abnormal information are selected by a preprocessing module and are uploaded to the Internet of Vehicles TSP platform, the Internet of Vehicles provides an access platform for the mobile terminal, thus improving the utilization of resources, reducing the running load of the server, and increasing the efficiency of data transmission.

The invention relates to an automatic parking lot berth management method and system based on visual analysis. The automatic parking lot berth management system is mainly technically characterized by comprising an intelligent visual sensor, an information transmission module, an information issuing module and a parking slot management center, wherein the parking lot management center comprises a computer analysis module, a parking lot management host computer and a database, the intelligent visual sensor preprocesses the acquired information and then transmits the preprocessed information into the computer analysis module by virtue of the information transmission module, the computer analysis module uncompresses a digital signal, berth state information is analyzed and detected in real time in a preset time interval, and finally the obtained information is issued on the information issuing module. The automatic parking lot berth management method and system provided by the invention are based on a computer vision technology, and a video compression coding and decoding technology, a real-time data transmission processing technology and a digital image processing technology are combined and applied, so that automatic management on the parking lot berth is realized, and the automatic parking lot berth management method and system provided by the invention have the advantages of simplicity, fast computing speed and low hardware condition requirement.

An arrangement for real-time data transmission through data communication networks is disclosed. The arrangement allows for real-time communication between applications located in different internal networks protected by firewalls by means of representing the applications by proxies and establishing TCP channels towards an intermediate proxy server localized outside the firewalls. A set of parameters residing in the server determines i.a. the number of required TCP channels based on the ratio of measured bandwidth between the data flow directions.

The invention discloses an automatic online monitoring method and device for VOCs (volatile organic chemicals) in water, which can be used for automatically and quickly monitoring the contents and concentration of VOCs in water, and transmitting the real-time data to a remote center platform and realizing remote reverse control. The device comprises an automatic water taking device, an automatic sampling device, a purging and gathering concentrator, a gas chromatograph, a tandem type detector, an industrial controller and a data transmission module. The method and the device disclosed by the invention are fit for automatically on-line monitoring 60 volatile organic chemicals published by the method 502.2 of US EPA (Environmental Protection Agency), particularly for 29 volatile organic chemicals stipulated in Sanitary Standard for Drinking water. The method and the device have the advantages of quick speed, high monitoring sensitivity, stable and reliable performance, full-automatic monitoring and data transmission and on the like, can be applied for automatic monitoring stations, mobile emergency monitoring stations and labs.

The invention relates to a digital seismic detector based on a computer network, and is used for solving the problems of high cost, high power consumption and poor function of the traditional seismic detector. The digital seismic detector consists of a central control operating system, root nodes, main nodes, base stations, a power supply station used for supplying power to an acquisition chain, the acquisition chain, optical cables and a big-cable unit; the central control operating system is connected with the root nodes through a plurality of bonded gigabit lines; the root nodes are connected with the main nodes and other field ground equipment through a plurality of the optical cables; a plurality of the main nodes are connected through gigabit optical cables to form a backbone network; the main nodes are connected with the base stations through large line cables; the base stations are connected through 100M big cables to form a secondary backbone network; the base stations provide a plurality of special synchronous transmission interfaces for connecting the acquisition chain and the power supply station; the acquisition chain consists of a plurality of acquisition stations; and the base stations have the function of the power supply station and are used for supplying power to the acquisition chain. In the invention, the data transmission of the backbone network is completed by adopting gigabit optical fiber, the data transmission of the secondary backbone network is completed by adopting the 100M cables, and the real-time data transmission of the acquisition chain is realized by adopting a similar token ring. The digital seismic detector has the advantages of low cost, low power consumption, strong function and capability of realizing data transmission of a 100-thousand-grade digital seismic detector in a reliable mode.

The invention discloses a high-accuracy submersible buoy system for marine data region monitoring. The high-accuracy submersible buoy system comprises a main submersible buoy and a plurality of auxiliary submersible buoys. A to-be-monitored region is formed around the main submersible buoy by the auxiliary submersible buoys. Profile survey data received by the main submersible buoy underwater arereceived in real time, and are uploaded to a water surface buoy system of a bidirectional communication satellite. The bidirectional communication satellite feeds back the survey data to a land lab inreal time. The main submersible buoy comprises a synchronizing signal sending unit, a receiving unit, a data storage unit and a real-time data transmission unit. The synchronizing signal sending unitis used for sending startup signs to the auxiliary submersible buoys at the same time to perform survey. The receiving unit is used for receiving monitoring data returned by the auxiliary submersiblebuoys. The data storage unit is used for storing the profile survey data of the auxiliary submersible buoys and sending the data to the water surface buoy system. A data sending unit for sending real-time monitoring data to the main submersible buoy is arranged on each auxiliary submersible buoy. The high-accuracy submersible buoy system has the advantages that the whole marine data of a sea region can be collected simultaneously, and can evaluate conditions of water bodies in the sea region more accurately as compared with conventional local marine profile data.

The invention relates to a buoy device for marine ecological monitoring and particularly relates to a buoy device with an image collection function, belonging to the technical field of marine ecological monitoring. The buoy device structurally comprises a buoy mother body, a buoy son body and an anchor fixing device, wherein the anchor fixing device is of a suspended cable structure, the lower endof the buoy mother body is connected with the upper end of a suspended cable, the buoy son body is arranged on the suspended cable and can move up and down along the suspended cable, data is transmitted between the buoy mother body and the buoy son body through a data communication line, and the buoy mother body is in data communication with a remote station through a satellite data communicationmodule. The buoy mother body and the buoy son body are separated, and the buoy son body moves up and down on the suspended cable, so that various monitored data at different depths in ocean can be conveniently collected, marine ecological parameter information at different water depths can be collected, and the real-time data transmission can be realized.

The invention relates to a mining subsidence monitoring information mobile acquisition terminal system and an acquisition method of the mining subsidence monitoring information mobile acquisition terminal system. The mining subsidence monitoring information mobile acquisition terminal system is applied to a portable electronic device which is electrically connected with a measuring module. The mining subsidence monitoring information mobile acquisition terminal system achieves data collection of the measuring module, obtains data information and conducts data processing on the data information. The mining subsidence monitoring information mobile acquisition terminal system comprises a research module which is used for collecting the data information of a measurer, a data module which is used for storing the data information and a transport module which is used for transporting the data information to the potable electronic equipment, and the portable electronic equipment deals with the data. The mining subsidence monitoring information mobile acquisition terminal system and the acquisition method of the mining subsidence monitoring information mobile acquisition terminal system have the advantages of achieving high precision, rapid real-time measurement and real-time data transportation of surface movement deformation information in an exploitation process and therefore guaranteeing accuracy, reliability and real-time of the movement deformation information. The invention further relates to the acquisition method of the mining subsidence monitoring information mobile acquisition terminal system.

The invention discloses a real-time monitoring system of a pipe network and a working method of the same. The system comprises an RFID electronic label, an Internet of Things sensing module, a wireless real-time data transmission module and a monitoring center. The working method comprises that (1) the Internet of Things sensing module collects data; (2) the Internet of Things sensing module transmits the collected data to the monitoring center via the wireless real-time data transmission module; and (3) the monitoring center carries out data statistics and data analysis of the received data. The real-time monitoring system of the pipe network and the working method of the same disclosed by the invention has the superiorities that an excavation scope is reduced, service life of the pipe network is prolonged, maintenance cost is reduced, a safety coefficient is increased, time is saved and efficiency is increased.

Provided is a system and method for broadcasting stereoscopic video data to users on the Internet based on Moving Picture Experts Group (MPEG)-4. The system includes: an encoding server for receiving stereoscopic video data, audio data, and Object Descriptor / Binary Format for Scene (OD / BIFS), which is information for controlling a content, and encoding the data into elementary stream (ES) having an MPEG-4 structure; a web server for receiving from the client any one among two-dimensional video display mode, field-shuttering video display mode and frame-shuttering video display mode; and a streaming server for generating a RTP (RTP) packet for real-time data transmission on the Internet by multiplexing the ES based on the display mode inputted into the web server, and transmitting the RTP packet to the client.

The invention discloses a self-adaptive hybrid MAC (Media Access Control) protocol of a wireless sensor network, belonging to the technical field of wireless sensor networks. The self-adaptive hybrid MAC protocol of the wireless sensor network is technically characterized by comprising the following steps of: a synchronous algorithm based on sink node-backbone node-ordinary node graded rough synchronization and ondemand fine synchronization, a cross timeslot allocation algorithm used for solving the problem of fairness of the node access of a heterogeneous sensor in a network environment and based on a fixed time frame length, a burst data race transmission method based on a reserved timeslot block, a CSMA / CA (Carrier Sense Multiple Access / Complex Arithmetic) algorithm based on service grade weighing retreat, a cross timeslot block allocation algorithm based on service grade weighing and a clock drifting influence offset method based on sending jitter and propagation delay protection. According to the self-adaptive hybrid MAC protocol, the integral energy consumption of the wireless sensor network can be reduced and the requirements for QoS (Quality of Service) of different service grades are met and a bran-new real-time data transmission solution scheme is provided for the application of the wireless sensor network with periodic event perception and event triggers perception.