55results about How to "Flexible communication methods" patented technology

The invention discloses a method and system for video live broadcasting in a small file slice mode based on a hypertext transport protocol (HTTP). The method is characterized in that an HTTP mode is adopted to communicate with a client-side; and a server-side splices each video stream into a plurality of small files of different formats in real time in accordance with specified time segments and then sends the obtained small files to the client-side. When network bandwidth is restricted, if the small files of the videos are lost, the server-side retransmits the small files to the client-side, thus ensuring the continuity when a user watches the videos, and improving the user experience.

The invention relates to a method for realizing mixed network structure, belonging to the wireless communication technique, especially the frequency spectrum application of cognitive radio system and the realization of physical transmission medium of cognitive radio mixed network structure, wherein it comprises: based on the interfere temperature model, calculating the allowed maximum receiving power of receiver at said time, calculating the real emission power of sending terminal, calculating the combination of two effective frequency spectrums, and realizing the point-to-multipoint (PMP) and mesh topology in mixed structure. The inventive classified spectrum share method can realize the mixed structure that supporting the point-to-multipoint (PMP) and mesh topology, to increase the system capacity and expand the area cover range.

The invention relates to a universal screen door linkage control system suitable for various wireless transmission modes, belonging to the technical field of rail transit signal safety control. The invention aims to overcome the defect of single wireless technology in the existing screen door linkage control system and simultaneously satisfy the large scale development of the urban rail transit. The system comprises a vehicle-mounted control subsystem, a double-network redundant wireless communication subsystem, a ground control subsystem and a screen door control subsystem. The whole screen door linkage control system is organically integrated through various wireless transmission modes of the double-network redundant wireless communication subsystem, and opening / closing control of the screen door is completed according to the command of the vehicle-mounted control subsystem. Aiming at different environments such as underground tunnels, overheads and the like in the urban rail transit, the corresponding wireless transmission modes are adopted to complete efficient and reliable transmission of the relevant information of screen door control. The technical scheme has the following beneficial effects: the communication modes are flexible and varied; and the economic cost is saved.

The invention belongs to a servo motion controller circuit, and specifically relates to a novel high-speed and high-precision multi-axis servo motion controller circuit. The circuit comprises an ARM-based intelligent control unit, SCM intelligent control modules, a USB bus communication unit, a data storage unit, an external network communication unit, a power management unit, a debugging and simulation unit, a passive crystal oscillation unit, and a human-computer interaction unit, wherein the USB bus communication unit is connected with N single-chip microcomputer intelligent control modules and is further connected with the ARM-based intelligent control unit through a USB bus, and the ARM-based intelligent control unit is connected with the data storage unit, the external network communication unit, the power management unit, the debugging and simulation unit, the passive crystal oscillation unit and the human-computer interaction unit. The novel high-speed and high-precision multi-axis servo motion controller circuit of the invention has the advantages of low cost, low power consumption, small size, high expansibility, good real-time performance, fast response, simple system wiring, high reliability, long life, and high resistance to electromagnetic interference.

The invention provides a construction method of a dynamic mesh of a vehicle-mounted ad hoc network. The construction method of the dynamic mesh of the vehicle-mounted ad hoc network comprises a selection method of a leading node of the dynamic mesh, a fusion method of the dynamic mesh, a separation method of the dynamic mesh and a replacement method of the leading node. The selection method of the leading node of the dynamic mesh comprises selecting a vehicle node with a largest evaluation function value as the leading node among vehicle nodes according to a respective evaluation function value within a mutual communication range; the fusion method of the dynamic mesh comprises enabling the dynamic mesh with less GM (GM) to be a merging party and to be added into an incorporated party with more GM of the dynamic mesh; the separation method of the dynamic mesh comprises sending a separation request to a leading node GL when a or a plurality of vehicle nodes are far away from a communication range of the leading node GL and forming into a novel mesh by the vehicle nodes which are willing to join into the novel mesh after separation; the replacement method of the leading node comprises selecting a candidate leading node and handing over the leadership when the leading node is prepared to give up the leadership. The construction method of the dynamic mesh of the vehicle-mounted ad hoc network is used for constructing the dynamic mesh of the vehicle-mounted ad hoc network.

The invention provides a method for realizing trusted transmission of a voice over internet phone (VoIP) media stream by expanding a MIKEY protocol. In the method, two communication parts are required to be provided with a reliable safe chip and a measuring module to measure the platform states of the communication parts. In the method, the platform state information of the two communication parts is transmitted through a data structure of a MIKEY key exchange protocol, so that the trusted transmission of the VoIP media stream is realized. By the method, a remote attestation technology of trusted calculation is tightly integrated into the MIKEY key exchange protocol to ensure real connection between the platform state information and a safe channel; and a standard MIKEY protocol is modified to the least and additional round-trip time is not added. At the same time, a system of the method has backward compatibility of a part of functions.

The invention provides a multi-node distributed field intensity test system and method based on Bluetooth communication. The test system comprises a distributed measuring unit and a terminal device having Bluetooth communication with the distributed measuring unit. The distributed measuring unit comprises N field intensity testers arranged at N test nodes respectively. Each field intensity tester is used for acquiring field intensity measurement data of the corresponding test node. The field intensity measurement data obtained by the N field intensity testers are gathered to a specified test node wirelessly and transmitted to the terminal device by the specified test node through Bluetooth communication. The terminal device is used for performing fitting processing on the measurement data and obtaining the field intensity spatial distribution state of an area to be tested. According to the test system and method, communication between all the electromagnetic field testers in the area and the remote terminal is achieved through a Bluetooth communication module, and the test system and method are easy and convenient to operate, reliable in communication and high in cost performance; electromagnetic field vector distribution of the area to be tested is obtained through a multi-point measurement and interpolation fitting mode, and thus data are complete, display is visualized, and the test system and method are convenient to use.

This invention discloses a communication method and a device for a mobile terminal with an instant messaging function. The communication method comprises steps of obtaining contacts from an address list on the mobile terminal with the instant messaging function, screening out effective contacts according to the obtained contact information, setting contact list of the address list in the application corresponding to the instant messaging function according to the effective contacts, determining the effective contacts in the contact list of the address list are instant messaging friends, instant messaging strangers, or mobile terminal contacts, transmitting communication order according to the state of the effective contact in the contact list of the address list in term of the asking party and perform communication with the effective contact. By using the communication method disclosed by the invention, the mobile terminal can determine the state of the effective contact and perform communication in different ways for the convenience of the asking party.

The invention provides a manned spacecraft network system, comprising a communication network, a bus control network and a terminal device. The terminal device comprises a wired terminal device and a wireless terminal device; the bus control network comprises a top-layer bus controller and a bus group; the top-layer bus controller is connected with the wired terminal device through the bus group, and is used for sending a control command to the wired terminal device through the bus group, and receiving telemetry information sent by the wired terminal device, through the bus group; the communication network comprises a top-layer switch, an access switch and a wireless access point; the access switch is connected with the top-layer switch, and the wired terminal device is connected with the top-layer switch or the access switch so as to access to the communication network; and the wireless access point is connected with the top-layer switch or the access switch, the wireless terminal device accesses to the communication network through the wireless access point, or the wireless terminal device directly performs communication through the wireless access point.

The application provides a service authorization method, equipment and system. The service authorization method includes: receiving application information of a service authorization application from a client; sending the application information to a service server, and receiving from the service server information to be signed which is obtained based on the application information; sending the information to be signed to the client, and receiving from the client countersign information obtained based on the information to be signed; and sending the countersign information to the service server, receiving a signature verification result of the countersign information from the service server, and deciding whether to approve the service authorization application according to the signature verification result. A communication link with the client is a first communication link, and a communication link with the service server is a second communication link. By adoption of the technical scheme of the service authorization method, an off-line authorization service between the client and the service server can be realized.

The present invention discloses a distributed power battery pack monitoring device, comprising a charger or load interface, a DC power supply interface, a first inductor L1, a second inductor L2, a plurality of slave machines, a battery pack, a host, a DC power supply line DC+, and a DC power supply line DC-; wherein each slave machine comprises a third inductor L3, a fourth inductor L4, a first capacitor C1, a second capacitor C2, a slave machine power supply module, a slave machine microcontroller MCU, a terminal voltage acquisition module, a temperature acquisition module, an internal resistance measuring module, and a slave machine DC carrier module; the host comprises a fifth inductor L5, a sixth inductor L6, a third capacitor C3, a fourth capacitor C4, a host power supply module, a host microcontroller MCU, a total voltage acquisition module, a current acquisition module, a display module, and a host DC carrier module. The distributed power battery pack monitoring device of the present invention achieves information interaction between the host and the slave machines through carriers on the DC power supply lines, thereby saving the limited inner space of an automobile, and saving time and cost of periodic maintenance of the automobile.

The invention discloses an orthogonality difference space-time network coding method of a double-direction relay channel model. The model comprises two information sources and a relay R. A multi-antenna mechanism is introduced into the information sources, and a plurality of antennas are arranged. The method comprises the following steps that a signal transmission process is divided into two stages, namely an information source transmission stage and a relay broadcasting stage. In the information source transmission stage, bit flow obtains an emitting signal matrix by constellation labeling, Alamouti coding, difference space-time modulation. In the relay broadcasting stage, signal receiving, detecting and demodulation are achieved, then two information source information xor network coding and differential modulation are achieved, and sending symbols are formed by mapping and are broadcasted to the two information sources. Multi-grouping processing is used during signal receiving, signal detecting is achieved by multiple-symbol difference spherical decoding, and the method is suitable for received signal decoding of an uplink relay and a downlink information source.

The embodiment of the invention relates to the technical field of vehicle-mounted Internet, and discloses a vehicle instant messaging method and a vehicle-mounted system. The method comprises steps: the click operation of a user on any electronic icon used to represent a vehicle in a vehicle-mounted map is received; and according to the click operation, communication connection is built with the vehicle corresponding to the electronic icon to perform information interaction based on the communication connection. When the embodiment of the invention is executed, through visual electronic icon operation, the communication connection between vehicles can become simpler and faster, and the communication mode is more flexible.

The present invention relates to a service response method and a service system for accessing an intelligent substation to a control master station. The method comprises the steps that a client of a service consumption end requests a service from an output agent; the output agent inquires a domain management center of the service consumption end and sends a service request to an input agent of a service provider end according to positioning information after receiving returned positioning information; the input agent sends a request to position the service to a service management center of the service provider end, and sends the service request to the service provider after receiving returned service provider information; and the input agent receives response information of the service provider, and then forwards the response information to the output agent of the service consumption end, and the output agent of the service consumption end forwards the service response information to the client of the service consumption end. Through adoption of the service response method and service system, the communication framework between the intelligent substation and the master station is expanded, and a more flexible communication manner is provided to meet the increasing interaction business demands between the master station and the substation.

The present invention relates to a communication connection system and method of home furnishing internet of things. The system comprises a terminal device, a server and a mobile control terminal. The terminal device comprises a main terminal and a plurality of slave terminals, the main terminal and the slave terminals are provided with a Bluetooth module, and the mobile control terminal is provided with a Bluetooth module; and the main terminal is in direct communication connection with the mobile control terminal through the Bluetooth mode, or is in communication connection with the server through the network and then is in communication connection with the mobile control terminal; the slave terminals are in direct communication connection with the mobile control terminal through the Bluetooth mode, or is in communication connection with the main terminal through the Bluetooth mode, then is in communication connection with the server through the network, and is finally in communication connection with the mobile control terminal. Compared to the prior art, the communication mode is flexible and changeable, and the communication data is interacted in time.

The invention relates to an automobile body control system, in particular to an intelligent automobile body control system. The intelligent automobile body control system comprises a switching module, a load module, a driving and collecting module, a communication module and a mobile terminal, wherein the switching module is used for generating a switching signal; the driving and collecting module is used for collecting the switching signal and sending the switching signal to the mobile terminal through the communication module; the mobile terminal is used for processing the received switching signal so as to generate a control signal and sending the control signal to the driving and collecting module through the communication module; then, the driving and collecting module controls the load module according to the received control signal. The intelligent automobile body control system can better save hardware cost and reduce the cost for later maintenance.

The invention discloses an electric meter box electricity anti-stealing system in the ubiquitous internet. The electric meter box electricity anti-stealing system comprises an electric energy meter measurement box of a user side and further comprises an electronic lock, a sound and light alarm device, an information processing module and a communication module; an output of the electronic lock isconnected with an input of the information processing module; a first control end and a second control end of the information processing module are respectively connected with the sound and light alarm device and the communication module; the electric meter box electricity anti-stealing system further comprises a data monitoring center positioned on a master station side; and the communication module carries out communication with the data monitoring center. The electric meter box electricity anti-stealing system is high in sensitivity, and immediately givens an alarm to frighten and alarm Illegal personnel once a phenomenon of illegally opening an electric meter box door occurs, and the system can carry out communication with the data monitoring center of a management side and can notifyan abnormal phenomenon to the data monitoring center in the first time so as to facilitate developing the next work by the power management department; and the system disclosed by the invention is relatively simple in composition structure and also relatively low in cost, and can be popularized and used in a large range.

The invention provides a picture compression method and device, a storage medium and electronic equipment, and the method comprises the steps of obtaining a picture compression request for a target picture, and generating a picture compression task corresponding to the picture compression request; adding the picture compression task into a message queue; and reading the picture compression task from the message queue, and executing the picture compression task. By adopting the embodiment of the invention, communication between the request access service and the picture compression service doesnot need to be carried out through a network, and the communication mode between the access service and the picture compression service is more flexible.

A system and a device of vehicle information application comprise a vehicle information application platform unit, a mobile information application terminal unit, a network terminal unit and an application service center unit, wherein the vehicle information application platform unit can be connected with the mobile information application terminal unit, and can also be connected with the application service center unit; the mobile information application terminal unit can be connected with the network terminal unit, and can also be connected with the application service center unit; and the network terminal unit is connected with the information service center unit. Accordingly, the vehicle information application system is formed.

The invention discloses an information exchange method and device of a body area network. The method comprises that a first deice uses a first frequency to receive a digital instruction which is sent to the body area network by a second device, and the body area network includes the first and second devices; whether the received digital instruction is the digital instruction that the second device sends to the first device is detected; and if YES, the first device receives the digital instruction, and uses a second frequency to sent digital information to the second device on the basis of the digital instruction. The information exchange method is high in anti-interference capability, has high reliability and safety in the information exchange process, and improves the user experience.

The invention relates to a multifunctional intelligent information elastic cushion plate comprising an elastic matrixes (41) and elastic bodies (42). Sensor chips (51) and flexible signal lines (71) are arranged in the elastic matrixes (41). The sensor chips (51) are connected with an external signal collecting and processing system through the flexible signal lines (71). The sensor chips (51) explore the situation that the multifunctional intelligent information elastic cushion plate produces a strain signal after bearing static pressure, and / or produces an extra dynamic strain signal after bearing extra positive pressure or extra negative pressure, and the strain signal and / or the extra dynamic strain signal are / is output to the external signal collecting and processing system through the flexible signal lines (71) to be analyzed and processed. Compared with the prior art, the working state and quality of railway parts can be known timely and comprehensively, the dynamic working state and the dynamic response level of a railway under the condition of being loaded are known, the operation safety of the railway is guaranteed, and the multifunctional intelligent information elastic cushion plate has the advantages of simple structure, fast installation, convenient adjustment and the like.

The invention discloses a response combined antenna compatible with omnidirectional communication and satellite navigation, and aims to provide a combined antenna which is smaller in height, strong inanti-interference capability, high in transportability and compatible with navigation and communication response functions. The combined antenna is realized through the following technical scheme: anavigation system antenna is fixed in a cylindrical cavity and comprises a multilayer microstrip antenna and an amplifying circuit module which are connected in sequence, a response antenna is composed of vertical plates which are vertically and fixedly connected to the surface of a base plate and distributed around a shielding cylinder in a circular array mode, folding oscillators respectively fixed on the vertical plates and a power divider assembled with a bottom plate interlayer of a lower base plate, and the power divider feeds the folding oscillators through the bottom plate interlayer;the amplifying circuit module amplifies and filters each path of radio frequency signals from the multilayer microstrip antenna, and the radio frequency signals of the satellite navigation antenna areoutput after the radio frequency signals are combined by a multiplexer in the amplifying circuit module. According to the invention, the satellite antenna or the response antenna can be replaced according to different application platform requirements so as to meet multi-platform application.

The invention relates to an absolute encoder circuit with a controller area network bus, belonging to an encoder data processing circuit in the photoelectric detecting technology field. The technical problem to be solved is to provide an encoder circuit with the controller area network bus. The technical scheme comprises a light source, an encoding disc, an amplification and digital processing circuit, a single chip machine, a controller area network bus, a photoelectric isolator and an input / output driver. The light emitted by the light source is absorbed by the single chip machine through the modulation of the encoding disc and the amplification and digital processing, the output / input of the single chip machine is connected with the output / input of the controller area network bus, the output of the controller area network bus is connected with the input of the photoelectric isolator, and the output of the photoelectric isolator is connected with the input / output driver; the input of the controller area network bus is connected with the output of the photoelectric isolator, and the input of the photoelectric isolator is connected with the output of the input / output driver. The circuit can realize the intelligent control of data communications with the multi-host mode.

The invention belonging to the technical field of on-line monitoring of a lightning arrester especially relates to a wireless-synchronization-technology-based integrated on-line lightning arrester resistive current monitoring apparatus that is used for gapless metal-oxide lightning arrester. The wireless-synchronization-technology-based integrated on-line lightning arrester resistive current monitoring apparatus comprises a housing, a resistor piece, and an electronic timekeeper and mechanical timekeeper unit. The resistor piece and the electronic timekeeper and mechanical timekeeper unit are installed in the housing; and a front window is arranged on the housing. The electronic timekeeper and mechanical timekeeper unit consists of an electronic timekeeper and a mechanical timekeeper that are connected in series. The series-connection electronic timekeeper and mechanical timekeeper are connected in parallel with the resistor piece. The mechanical timekeeper is displayed from the front window. And an aviation plug is arranged at the lower cover of the housing. The monitoring apparatus has advantages of simple structure, reasonable design, and advanced structure. On-line monitoring of resistive currents of lightning arresters with all voltage levels is realized; the resistive currents of lightning arresters are measured precisely; and thus the operation information of the lightning arresters is obtained accurately.

The invention relates to the robot technology field and more particularly, to a security control system for an agricultural robot, and the system comprises a positioning module, an LCD displaying and photographing module, a GPRS wireless transmission module, a motor driving and controlling circuit, a wireless communication interface circuit, an ultrasound oscillation circuit and a robot driving circuit. The GPRS wireless transmission module utilizes the GPRS mobile communication network to realize the bidirectional transmission of information. The robot-transmitted data to the remote monitoring platform mainly contain the onsite image information and the current positioning information of the small vehicle. What the remote monitoring platform transmits to the small vehicle is mainly the instruction information to realize the remote control. The robot driving circuit is used to complete the driving of the modules in the entire process. The wireless communication interface circuit utilizes the PTR2000 wireless communication data receiving and transmitting module integrating the receiving and transmitting into one and suitable for duplex and simplex communications. Due to the flexible communications, the wireless communication interface circuit can be directly connected with the serial port mode of the single chip microcomputer. The system of the invention is simple in structure and convenient in control. With the system, remote intelligent control can be realized, making the system greatly innovative.

The invention discloses a motion control system for an automobile crane and a safety control method for the motion control system. The motion control system comprises the automobile crane and a safetycontrol system for the automobile crane, and the safety control system for the automobile crane is composed of a cantilever crane control system, a lifting appliance control system, a walking controlsystem, a conventional vehicle control system, a safety protection system and the like. According to the motion control system and the safety control method thereof, when safety control is carried out on the automobile crane, CAN bus control is introduced, the CAN bus protocol is a structurally open and broadcast type network communication protocol, and a CAN bus is called a controller local areanetwork field bus; and as the controller local area network bus with a good application potential, in recent years, the CAN bus is more and more widely applied to the fields of automobile computer control systems, textile machinery, packaging machinery, papermaking machinery, agricultural machinery, engineering machinery, robots and other open type distribution intelligent control.

The invention discloses an atmospheric environment monitoring system based on the heterogeneous Internet of Things, which includes an atmospheric environment monitoring node, an intelligent gateway, a base station, a cloud, and a remote monitoring terminal sequentially connected by communication. The atmospheric environment monitoring node collects data on atmospheric environment parameters, The intelligent gateway realizes the communication connection between the atmospheric environment monitoring node and the base station, the base station realizes the communication connection between the intelligent gateway and the cloud, and the remote monitoring terminal performs data viewing and provides a window; a monitoring method based on the atmospheric environment monitoring system includes the following steps: S1 , configure the intelligent gateway; S2, configure the atmospheric environment monitoring node; S3, the atmospheric environment monitoring node collects the atmospheric environment parameters, and transmits to the remote monitoring terminal to realize the monitoring of the atmospheric environment; S4, receives the end signal, then ends the monitoring; the present invention It solves the problems of large monitoring blind areas, inability to accurately locate pollution sources in time, high investment costs, complex networks and poor stability existing in the prior art.

The invention discloses a human body blood oxygen saturation test system based on a WIFI (Wireless Fidelity) and bluetooth two-in-one technology, which comprises an acquisition, test and detection module and a data receiving and analysis module, wherein the acquisition, test and detection module and the data receiving and analysis module perform data transmission and exchange through the WIFI and bluetooth two-in-one technology; the acquisition, test and detection module comprises a photic driving detection module, an acquisition processing module and a WIFI and bluetooth communication emission module which are connected sequentially; the acquisition processing module comprises a special blood oxygen probe sensor for medical treatment, an acquisition board with an MSP430 singlechip, and a power supply unit; and the special blood oxygen probe sensor for the medical treatment is connected with the acquisition board with the MSP430 singlechip, the power supply unit and the WIFI and bluetooth communication emission module. With the adoption of the mode, the system is high in portability, stable in data transmission, and flexible in communication mode, and can work all day long.

The invention relates to a rolling mill control system, in particular to a titanium alloy rolling mill control system based on optical fiber signal transmission, which comprises a main control PLC, asub-control PLC and a direct current motor control system, and also comprises an optical fiber communication circuit, an overcurrent protection circuit, a can acceleration system and a remote controlend; the protocol of the optical fiber communication circuit is used as a data transmission protocol, and an optical fiber channel supports a plurality of upper-layer protocols including VIA, SCSI, IPv4, IPv6, SBCCS, ASM and the like, and has high real-time property, high reliability, high bandwidth and high cost performance; and the CAN acceleration system bus interface is matched with the traditional RS232 serial interface, so that the network communication capability of the equipment is enhanced, the remote operation function is realized, and the communication mode is flexible. The invention can work in a multi-master-slave mode, and can send and receive data in a point-to-point, point-to-multipoint and global broadcasting mode; and the titanium alloy rolling mill control system based on optical fiber signal transmission is simple in structure, capable of realizing remote control, high in safety performance and system signal transmission efficiency and extremely creative.

The invention provides a quick switching method and a quick switching system for an LED stage screen, and the method comprises the steps: setting a first screen interface and a second screen interfaceof an LED display screen, wherein the two screen interfaces have corresponding independent screen interface parameters and display contents, and the display contents of the first screen interface andthe second screen interface are different; in response to switching from the first screen interface to the second screen interface, identifying screen interface parameters and display content of thefirst screen interface, and packaging the screen interface parameters and the display content into a first screen interface data file in a specified format for storage; reading a second screen interface data file; in response to successful reading, closing the first screen interface; and displaying the second screen interface, and importing the analyzed display content and screen interface parameters in the second screen interface data file. According to the invention, free switching between a common screen and a stage screen can be realized on the same LED display screen, a special stage carddoes not need to be purchased, the communication mode is flexible, and the number of the screens is not limited.