50results about How to "High reliability transmission" patented technology

The invention provides a multifunctional wireless Mesh gateway device for a multi-RF (Radio Frequency) mine and a control system thereof. The device comprises a main control system board, a subsystem board and the like, wherein the main control system board comprises a main controller, a main control system power processing module, a ZigBee communication module and an energy-saving control circuit; and the subsystem board comprises a sub controller, a subsystem power processing module, a WiFi intelligent access card and the like. The control system comprises a hardware equipment bottom layer drive system, an embedded type operation system, an energy-saving control system and a multifunctional Mesh gateway control system. The invention has the advantages that the device can support simultaneous transmission of multimedia business in a multi-RF channel WiFi wireless Mesh network and a ZigBee wireless Mesh network, realizes network fusion of an industrial ethernet, a field bus and a WiFiwireless local area network, supports high reliability communication and self-organized networking and supports communication energy-saving control. The stand-by service life can be efficiently prolonged.

The invention discloses a multi-hop wireless collaboration relay scheme which can realize full-rate data transmission, and is applicable for a distributed wireless communication network. In the scheme, the data transmission from a source node S to a target node D is finished by three links; each link consists of a plurality of relay node groups in a forwarding mode; the data communication on each link is divided into a plurality of basic transmission processes; distance relay communication can be realized by cascading the basic transmission processes; each basic transmission process consists of three communication stages, a baseband signal transmitted in each communication stage is a modulation symbol obtained by linear complex field coding; each relay node group finishes the forwarding of the received signals by adopting a cycle delay diversity way; and while the high-reliability information transmission is realized, the receiving end only needs to perform joint detection on three symbols, so that the detection complexity is low, and the practical value is high. In addition, in the relay transmission process, if the relay groups in unequal numbers are distributed for the to-be-transmitted information with different priority levels and error code performance requirements, the disclosed multi-hop collaboration relay scheme can be used for the hierarchical transmission of data after being adjusted, so that the transmission quality requirements of a plurality of types of wireless service are met.

The invention relates to a vehicle tire pressure monitoring system and a monitoring processing method based on GPS and 3G networks, comprising a detection transmitting unit for collecting and monitoring the pressure and the temperature of tires, a system host for receiving the detecting data signal transmitted by the detection transmitting unit via wireless transmission, a GPS unit for transmitting the received positioning signal of GPS satellite to the system host via wire transmission, a 3G unit for accessing the system host into the 3G network for wireless data transmission. The invention has the advantages of automatic alarming for seeking help timely in case of the tire accident, and real-time positioning of vehicle for providing relevant information and facilitating help seeking in case of accident.

The invention relates to a cognitive wireless sensor network technology, and relates to a broadcast preamble interception based cognitive sensor network media access control method. Cognitive nodes ina cognitive sensor network adopt periodic dormancy-awakening mechanisms, the state of a main user can be determined by using a spectrum sensing technology, and a data sending node can build a communication link by using a broadcast preamble manner if the main user is not active. According to the order of awakening and the considering of the hop information from a gateway, each neighbor node can autonomously decide to act as a relay node to perform data forwarding. In addition, because the transmission conflict of the cognitive nodes and the main user can be caused by the regression of the main user or missed alarms, the reliability of the transmission of data packets can be guaranteed by adopting a confirmation based retransmission mechanism. The method does not depend on common control channels, so that low overhead and reliable access of cognitive sensor network on authorized frequency bands can be realized.

The invention is applied to the technical field of communication, and provides a service data transmission method and a service data transmission system. The method comprises the following steps of: performing primary packaging on service data read from a serial port by an optical network unit (ONU) according to a pre-expanded operation, administration and maintenance (OAM) protocol; performing secondary packaging on the service data subjected to the primary packaging according to the OAM protocol, so that the service data subjected to the primary packaging exists in a form of operation, administration and maintenance protocol data unit (OAMPDU); and transmitting the service data subjected to the secondary packaging to an optical line terminal (OLT), and forwarding the service data subjected to the secondary packaging to a remote server by using the OLT. In the embodiment of the invention, the primary packaging is performed on the service data read from the serial port by the ONU according to the pre-expanded OAM protocol; the secondary packaging is performed on the service data subjected to the primary packaging according to the OAM protocol, so that the service data subjected to the primary packaging exists in the form of OAMPDU; and the service data subjected to the secondary packaging is transmitted to the OLT so as to realize the highly-reliable transmission of the service data.

The invention discloses a high-reliability and lossless data acquisition and storage method. After receiving network data sent by a client, a server inserts the data into the tail of a message sendingqueue, informs a database storage thread and then stores the network data according to a massive storage overhead caching algorithm; the database storage thread reads the data from the head of the message sending queue and inserts the data into a background database; and a heartbeat message is sent between a main acquisition and transmission server and a slave acquisition and transmission serverregularly to detect the survivability of the main server. According to the method, the data can be sent to a server module in a high stability and high reliability mode in the high traffic and outburst huge traffic environment, and meanwhile it is guaranteed that the acquired data is losslessly forwarded to the background database on the abnormal condition generated in the switching process of a main server module and a slave server module.

The invention discloses a data transmission method on the basis of a 433Mhz private wireless automatic networking protocol. The data transmission method adopts the 433Mhz wireless private transmission protocol, not only reduces power consumption, but also is beneficial to high-reliability transmission on transmitted audio and video data due to simplicity, independence, low requirements for a microprocessor, low integral cost and higher safety of the private protocol, and not only avoids high development cost of Bluetooth and wifi (Wireless Fidelity), but also reduces power consumption of equipment; and meanwhile, the used frequency-hopping spread spectrum technology is not only beneficial for solving the problem of signal interference and greatly improves data detection efficiency of a frequency band, but also improves safety of data transmission.

The invention discloses a distributed road traffic signal control system based on 5G communication, and belongs to the field of road traffic signal control. The distributed road traffic signal controlsystem comprises an intersection control center, a distributed control signal lamp and a radar and video all-in-one machine; the radar and video all-in-one machine collects intersection traffic flowdata through a radar and a video sensor and sends the collected flow data to the intersection control center through a 5G communication network; the distributed control signal lamp collects the operation state of a signal unit through a voltage sensor and a current sensor, sends the state of the signal unit to the intersection control center through the 5G communication network, and receives and executes an operation scheme issued by the intersection control center; and the intersection control center analyzes and generates an intersection direction scheme according to the received intersection traffic flow data and signal lamp state information, sends an intersection release scheme to the radar and video all-in-one machine and the distributed control signal lamp through the 5G communication network, and completes a control node autonomous monitoring function. According to the distributed road traffic signal control system, the 5G communication technology is utilized, the functions ofan annunciator are preposed, the intersection wiring workload is reduced, and the system availability is improved.

A wiring structure including a transmission line structure capable of simplifying a manufacturing process is obtained. This wiring structure comprises a first trench formed on a first insulator film provided on a substrate, a first wire formed in the extensional direction of the first trench along at least part of the inner surface of the first trench and a second wire formed to be opposed to the first wire through a second insulator film for forming a transmission line for transmitting signals with the first wire. The first wire, the second insulator film and the second wire are embedded in the first trench. This wiring structure is manufactured through a single lithography step, a single etching step and a single resist removing step for forming the first trench and a single CMP step, whereby the manufacturing process is simplified.

A reliable reflection communication system based on channel coding comprises an excitation signal source, a reflection tag TAG and a receiver; a signal sent by the excitation signal source is transmitted to the receiver through the reflection tag TAG on a backscattering link; the reliable reflection communication system further comprises a WIFI transmitter, and the reflection tag TAG carries out information interaction with the receiver through the WIFI transmitter; the receiver comprises optimization processing, and the optimization processing is that the USRP RIO equipment firstly monitors an excitation channel, samples an I / Q component by setting a sampling frequency, and then calculates the duration time of a transmission state and a silence state; and finally, the duration is inputted into an optimization algorithm to obtain an optimal RS code parameter, and an index of the optimal RS code parameter is fed back to the label. The optimization algorithm comprises the steps of stream-oriented estimation, probability distribution estimation, symbol-oriented estimation and RS code optimization. According to the method and the device, through coding, by utilizing the reflected information carried on the WiFi signal, a relatively short WiFi silence period can be overcome, so that sustainable reflection transmission is realized.

The invention discloses a dense ball type rotating and reciprocating two-degree-of-freedom rolling shaft system which comprises a transmission spindle (1), two bearing outer covers (6) and two dense ball type bearings (7), wherein two ends of the transmission spindle (1) are supported by the two dense ball type bearings (7); a bearing outer cover (6) is arranged on the outer side of each dense ball type bearing (7); the exteriors of the bearing outer covers (6) are fixed; the dense ball type bearings (7) comprise retainers (8) and balls (9) and are of overall multi-ball dense-row structures; the retainers (8) are of ring cover structures with certain thicknesses; multiple communicated bearing bush-shaped hole slots are formed in the walls of the ring covers, and are of exterior-opened and interior-tightened structures; the opened opening part is a cylindrical surface; the interior tightened part is a spherical arc surface; the two parts of profiles are tangential; and the balls (9) are assembled in the hole slots and are in clearance fit with the outer cylindrical surface of the transmission spindle (1) and the inner cylindrical surfaces of the bearing outer covers (6).

The invention discloses a double-star redundant topology architecture system and method. The system comprises a calculation module unit, a switch module unit, and a back insertion module unit, whereinthe switch module unit comprises a master switch module unit and a slave switch module unit that are separately and mutually connected with the calculation module unit, the back insertion module unitcomprises two switch back insertion module units that are respectively connected with the master switch module unit and the slave switch module unit, the master switch module unit is configured for data distribution and system state management, the slave switch module unit is configured for acquiring a fault state of the master switch module unit and actively taking over a function of the masterswitch module unit in response to receiving of an instruction that the master switch module unit fails. The system and method effectively prevent overall system function failure and data loss caused by failure of a node device in a single node start topology, and guarantees highly reliable data transmission.

The invention relates to a blade reinforcement server system based on a VPX architecture. The blade reinforcement server system comprises a plurality of computer units, switching unit, the switching unit comprises a master control switching unit and a slave control switching unit which are connected with each other; wherein the master control switching unit and the slave control switching unit arerespectively connected with each computer unit, the master control switching unit is configured to control the computer units, and the slave control switching unit is configured to monitor the mastercontrol unit and take over the control of the master control switching unit on the computer units in response to the monitoring of the failure of the master control switching unit. The system also comprises a back insertion unit connected with the exchange unit and configured to provide data transmission between the inside and the outside of the system. The invention further discloses a server for blade reinforcement based on the VPX architecture. The problems of function failure and data loss of the whole system caused by failure of node equipment in a single-node star topology are effectively avoided, and high-reliability transmission of data is ensured.

Described herein is a control arrangement for mounting on an external surface of a luminaire. The control arrangement comprises a control module (1) and a control module base configured to be mountedto one another. The control module base comprises a near-field communication means configured to communicate with a near-field communication unit provided in the control module (1).

The invention discloses a high-availability lossless data acquisition and storage system based on a high-speed environment. The system comprises a client acquisition module, a server module and a background database; and the background database is connected with a database engine system, the client acquisition module is connected with the input end of a main server module through a main connectionport, the output end of the main server module is connected with the background database through a main database engine system, the client acquisition module is connected with the input end of a slave server module through a slave connection port, and the output end of the slave server module is connected with the background database through a slave database engine system. According to the system, data can be sent to the server module in a high stability and high reliability mode in the high traffic and outburst huge traffic environment, and meanwhile it is guaranteed that the acquired data is losslessly forwarded to the background database on the abnormal condition generated in the switching process of the main server module and the slave server module.

One or more embodiments of the present specification provide a signal sending method of an MIMO transmission system based on polarization transformation. A signal sending end in the MIMO transmissionsystem determines symbol streams respectively corresponding to N sending time slots according to to-be-sent data; the signal sending end can respectively determine sending symbol vectors respectivelycorresponding to the N sending time slots; the signal sending end pre-codes the modulation symbol vectors corresponding to the sending time slots according to a pre-coding codebook to obtain sending symbol vectors corresponding to the sending time slots; and the signal sending end sends the sending symbol vectors corresponding to the sending time slots to a signal receiving end in the MIMO transmission system in sequence. Thus, the embodiments of the present invention can reduce the bit error rate in the transmission process of sending the symbol vectors, thereby improving the reliable transmission of the data and the performance gain of the data transmission.

The invention discloses an electromechanical actuator limiting stroke circumferential anti-blocking structure. The structure is used for providing full-stroke and high-reliability transmission for anelectromechanical actuator controlled by air power; a clamping buckle structure and a clamping groove structure are correspondingly added between a ball screw rod and a ball nut, so that axial brokenend face rigid contact between the ball screw rod and the ball nut at the limit position is prevented; by means of cooperation with a ball, transmission is stable, the requirement of anti-blocking ofthe electromechanical actuator at the limit position is skillfully realized, the transmission reliability and the position control precision of a ball screw rod pair are improved.

The invention provides a marine environment monitoring-oriented unmanned aerial vehicle and unmanned ship cooperative information returning method, which comprises the following steps of: uniformly expressing the influence of a channel condition in wireless transmission and a communication distance between an unmanned aerial vehicle and an unmanned ship on information return as the preference of the unmanned ship to a wireless channel allocated to the unmanned aerial vehicle; constructing a preference degree ranking table of the unmanned ship to the unmanned aerial vehicle; analyzing the transmission rate of information when the cooperative information of the unmanned ship and the unmanned aerial vehicle is returned, and maximizing the total throughput of the system through the joint optimization of the association relationship between the unmanned aerial vehicle and the unmanned ship and the transmitting power of the signal; and designing a heuristic algorithm based on a matching theory, determining a matching relationship between the unmanned aerial vehicle and the unmanned ship, and further determining the generation power of the unmanned ship and the unmanned aerial vehicle based on a convex optimization theory. The invention can effectively reduce the time complexity and calculation time of an algorithm, solves a problem that the connectivity of a communication link is weaker when the unmanned aerial vehicle serves as a mobile communication relay, and effectively monitors the marine environment.

A drive device (1) for machine auxiliary units (K, L, S / G) for transmitting a machine drive force from a machine (VM) to the machine auxiliary units by a belt. At least one machine auxiliary unit is provided as an electrical machine (S / G) that has either a poly-V-belt pulley to be driven by a poly-V-belt or a toothed belt pulley to be driven by a toothed belt. The belt has a toothed side (R1) and a poly-V side (R2) opposite one another, wherein a machine belt pulley is designed to drive the toothed side of the belt for transmitting the machine drive force, if the electrical machine has a poly-V-belt pulley, or is designed as a poly-V-belt pulley if the electrical machine has a toothed belt pulley.

The invention provides a time-deterministic transmission design method for a time-triggered Ethernet (TT) service. The method comprises the following steps of: 1, defining a gating scheduling table; step 2, end system sending gating design; 3, the switch receives gating design; step 4, switch sending gating design; and step 5, end system receiving gating design. Compared with the traditional Ethernet, in the design method provided by the invention, the TT data frame is subjected to service scheduling strictly according to the family period and the pre-planned gating starting time point, and the transmission delay has certainty and low jitter. Compared with a traditional Ethernet data frame, in the design method of the invention, conflict-free reliable transmission of the TT data frame is realized through a pre-formulated scheduling rule, and the bandwidth and high-reliability transmission of the TT data frame are ensured. The design method provided by the invention can ensure that the packet loss problem of the TT data frame does not exist in network transmission.

A transmission apparatus includes a package that has a plurality of slots into each of which a board can be freely detachably inserted; at least one control board; a PWE interface communication unit that is connected to the control board, converts an input SDH or PDH signal to a packet signal, and outputs the converted signal to the control board; a radio transmission communication unit that is connected to the control board, converts the packet signal to a radio signal, and outputs the converted signal; and an optical transmission communication unit that is connected to the control board, converts the packet signal to an optical transmission signal, and outputs the converted signal. The units are separately inserted in the slots.

The invention discloses a dynamic aging device and method for a non-transparent bridge PCIe switching circuit, and the device employs a root complex CPU, an endpoint device, a port mode configuration line, a port interconnection bus, and a device state indication line, and covers a physical layer, a data link layer, a transaction layer, and a non-transparent bridge address conversion and switching function of the circuit. The circuit is dynamically aged according to the normal working frequency and the bus interface rate during the aging period; according to the invention, a root complex CPU and numerous PCIe endpoint devices do not need to be externally connected to each non-transparent bridge PCIe switching circuit, only one root complex CPU is needed on the whole burn-in board, and the cost of components on the burn-in board is greatly saved due to the connection mode of the root complex CPU; due to the fact that the number of peripheral PCIe devices is reduced, the density of aging devices on the aging board of the same area is increased, more circuits can be aged in the same aging high-temperature box, and the test cost is saved.

The present invention provides a cross-board isolation circuit. The cross-board isolation circuit includes: a first circuit, a second circuit, and a third circuit that are mutually independent in terms of hardware. The first circuit is provided with a first isolation unit. A second isolation unit is provided on the third circuit, and the first isolation unit is connected to the second isolation unit through the second circuit. The cross-board isolation circuit of the present invention improves the anti-interference ability of long-distance cross-board analog signal transmission, has the function of signal isolation between boards, and improves the reliability and stability of the system. The adoption of the LVDS interface in the present invention has a significant effect on improving the stability of digital signal transmission between boards and the anti-interference ability.

Disclosed is a data transmission system having a transmitter and a receiver. The transmitter encodes external input signals to acquire coded transmission data transmitted in multiple paths with different frequency band, and then transmits them to respective receiver; and the receiver performs data fusion on the received transmission signals to acquire coded received data, and decodes it to acquire and output the decoded data. In conclusion, since the received signals are split into a plurality of transmission signals of different frequency bands by the transmitter and the signals are fused in the receiver, the signals are not susceptible to the same frequency interference during transmission, improving the anti-interference of the data transmission system, realizing high-reliability transmission at low cost or in a complex wireless environment, also expanding the applications of the data transmission system.

The invention discloses a redundancy decision control method based on double buses, and the method comprises the following steps that S1, one of the spacecraft control units A, B and C is taken as anRT terminal, receives a bus message sent by an MIL-STD-1553B bus transmission after the data is verified to be valid, and transmits a bus message to the other two control units via a CAN bus; S2, oneof the spacecraft control units A, B, and C receives the bus messages sent by the other two control units, and verifies the validity of command data; S3: one of the spacecraft control units A, B and Cperforms the two-out-of-three output of the received MIL-STD-1553B bus message and the bus message forwarded by the other two control units through combining with a heartbeat signal captured by the control unit, so as to cope with known one-degree and two-degree faults. The method uses two mature bus technologies of MIL-STD-1553B and CAN to effectively ensure real-time and highly reliable transmission of bus messages, effectively solves single-point faults of hardware, improves the reliability and security of the system, gives consideration to the balance reliability and economic performance,and has good versatility and scalability.

One or more embodiments of this specification provide a signal transmission method for a MIMO transmission system based on polarization conversion. The signal transmission end in the MIMO transmission system determines, according to the data to be sent, the symbol streams corresponding to each of the N transmission time slots; The signal transmitting end may respectively determine the respective transmit symbol vectors corresponding to the N transmit time slots; the signal transmitting end precodes the modulation symbol vectors corresponding to each transmit time slot according to the precoding codebook, respectively, to obtain each transmit time slot. The time slots correspond to the respective transmit symbol vectors; the signal transmitting end sequentially sends the transmit symbol vectors corresponding to the respective transmit time slots to the signal receiving end in the MIMO transmission system. In this way, the present embodiment can reduce the bit error rate during the transmission process of the transmitted symbol vector, thereby improving the reliability of data transmission and the performance gain of data transmission.

An arrangement, apparatus and method for conveying poultry is provided. The arrangement transfers slaughtered poultry between conveying lines and has at least one rotary device for conveying suspended poultry along a curved conveying path with suspension mounts, each designed to hold a poultry body by both legs. A linear motor conveying device with a guide rail, which comprises a linear drive, forms a circulating conveying path and has runners, each arranged to be separately controllable and movable along the guide rai by the linear drive. A holding element is designed to accommodate one poultry leg at a time, with one of the holding elements arranged on each runner. The rotary device and the linear motor conveying device are arranged such that, in a transfer region, the curved conveying path at least partially overlaps with a curved portion of the circulating conveying path in order to transfer the poultry.

The invention provides a data transmitting circuit between aviation equipment. The circuit comprises a level conversion circuit, an isolation circuit and an impedance matching circuit; one end of thelevel conversion circuit is connected with an FPGA, the other end of the level conversion circuit is connected with the isolation circuit, and the level conversion circuit is used for receiving a buslogic signal sent by the FPGA and converting the bus logic signal into a standard level signal; one end of the isolation circuit is connected with the level conversion circuit, the other end of the isolation circuit is connected with the impedance matching circuit, and the isolation circuit is used for isolating the standard level signal from a cable bus signal output by the impedance matching circuit; one end of the impedance matching circuit is connected with the isolation circuit, the other end of the impedance matching circuit is connected with external aviation equipment, and the impedance matching circuit is used for outputting cable bus signals and achieving impedance matching of the data sending circuit between the aviation equipment.