93 results about "SpaceWire" patented technology

The invention discloses an FPGA and DSP-based satellite-borne electronic system data interface system. The system comprises an FPGA processing module, a DSP processing module, an interface circuit module and an accessory circuit module, wherein the DSP processing module is used for realizing SpaceWire data coding-decoding processing, reception-transmission control and a SpaceWire control protocol, and communicating with a SpaceWire node; the FPGA processing module is used for realizing functions of processing data of different buses, controlling information flows and exchanging information between interfaces; and the interface circuit module is used for realizing data of CAN node equipment, 422 bus node equipment, 485 bus node equipment and 1553B node equipment. The system disclosed by the invention can realize the mutual signal conversion between a SpaceWire signal and a CAN signal, a 422 signal, a 485 signal and a 1553B signal, can solve the problems of mutual compatibility and mutual operation between SpaceWire data and interface information of different buses, and can be widely applied to various space equipment electronic systems.

The invention discloses a management system for payload information of a satellite based on an intelligent high-speed router. The management system comprises an intelligent high-speed router, a payload device, a data handling device, a data storage device and a data transmission device, wherein the intelligent high-speed router consists of a SpaceWire routing module, an intelligent control module and a SpaceWire standard bus interface; and the SpaceWire routing module is used for directly exchanging data from the payload device, the data handling device, the data storage device and the data transmission device, or used for outputting the data to a satellite payload low speed bus network by a CAN (Controller Area Network) interface of the intelligent control modular, and used for transmitting a remote control command from the satellite payload low speed bus network received by the intelligent control module to the payload device, the data handling device, the data storage device and the data transmission device. The system solves the problems that currently the interface of a satellite payload system and a data transmission system is complex, rapid assembly and testing are difficult, and the technology upgrade of a device is difficult.

The invention relates to a method for transmitting and processing high-speed data of a satellite and discloses a virtual channel based SpaceWire network transmission and processing system structure of the satellite. The method comprises packaging of satellite high-speed load data science source data, preprocessing of virtual channels, SpaceWire protocol format packaging, Consultative Committee for Space Data System (CCSDS) bit-stream service processing, packaging of physical transmission frames and the like. Data format analyses are conducted through building of a hardware test platform so as to finish storage and inversion of load data packages. By the aid of the method, according to processing and transmission characteristics of satellite borne high-speed data, data processing procedures are optimized, and the SpaceWire bus network transmission efficiency is improved.

The invention discloses a SpaceWire bus router supporting a host interface. The SpaceWire bus router comprises a SpaceWire port module, a routing switching control module, a configuration port module,a register group and a host interface module. The SpaceWire port module is used for sending data on a SpaceWire link to the routing switching control module or sending the data of the routing switching control module to the SpaceWire link; the routing switching control module is used for performing routing control on the data among the SpaceWire port module, the configuration port module and thehost interface module; the configuration port module parses a RMAP command packet; the register group is used for performing router configuration and status monitoring; and the host interface module is connected with an external processor, and supports the external processor to perform read and write operations on the SpaceWire bus router. The SpaceWire bus router reduces the complexity of the system, expands the access mode and improves the reliability of data transmission.

The invention provides a high-speed large-data-volume information processing system, and relates to the technical field of integrated navigation and image processing. The high-speed large-data-volume information processing system comprises a multi-core DSP processing module, an FPGA data preprocessing module, a high-speed interface module and other accessory circuit modules; the multi-core DSP processing module serves as a data core processing module and is responsible for the functions of data processing, information flow control, external information interaction and the like; the FPGA data preprocessing module is responsible for the functions of external data coding and decoding preprocessing, logic control, image display and the like; the high-speed interface module comprises a high-speed Ethernet interface, a Spacewire interface, a high-speed expansion interface and the like and is used for achieving high-speed data transmission with the outside; the other accessory circuit modules of the system comprise the clock module, the power supply module and the like. The high-speed data processing system can be used for operating an IMU-GPS-starlight integrated navigation algorithm and has the significant advantages of being high in integration, low in cost, high in processing capacity, rich in interface and the like compared with a single-DSP multi-board or multi-DSP single-board or multi-DSP multi-board system scheme.

The invention relates to a SpaceWire route implementing method, particularly relates to a SpaceWire dynamic route implementing method, and aims to solve the problems of poor application flexibility and expansibility of a SpaceWire network caused by the fact that all conventional SpaceWire routers are static routers. According to the method, the SpaceWire node newly added in a network firstly broadcasts and issues a route request data packet; upon reception of the data packet, the SpaceWire router in the network system updates and transmits a physical address in the route request data packet according to a corresponding physical port and updates a route table; other SpaceWire nodes update other stored node information and are added with the relevant information about the SpaceWire nodes to form a route request reply data packet and then transmits the route request reply data packet to the newly added SpaceWire node; when the route request reply data packet passes through the SpaceWire router, the SpaceWire router updates the physical address in the data packet and transmits the updated physical address to the newly added SpaceWire node; and after receiving the route request reply data packet, the newly added SpaceWire node updates the stored relevant information of other nodes. The method is applicable to dynamic route establishment in the communication process.

The invention discloses an expansion device for the device ports of data network node that includes several interfaces which are used to connect with the network node device, and also includes a pair of switch chip of low voltage difference signal crossing point and a logic circuit for switch control; the interface is connected with the switch chip of low voltage difference signal, one interface connects with one network node device, a pair of switch chip of low voltage difference signal crossing point are connected with the logic circuit for switch control separately, the data is transmitted from one network node device to other network node device; the switch control logic circuit selects the device which is used to transmitted the data according to the requirement of application dynamically to realize the time-division transmission between the device of network node. The invention provides an effectively means for realizing one device with 200Mbps spacewire data network to connect with four device, and also provide an effective method for reducing the system cost.

The invention provides a method for routing distribution of a satellite channel. After an effective load device accesses a Spacewire bus network, a satellite conducts polling on the effective load device through a bus controller, reads an electronic data table at a load end and obtains data transmission rates of loads, then the bus controller compares any two channels of a plurality of obtained channel of effective loads or the sum of a plurality of data transmission rates with the transmission rate of a destination address A or the transmission rate of a destination address B, as per the principle that the load transmission rate in the Spacewire bus network must be lower than the transmission rate of the destination address A of a router or the transmission rate of the destination address B of the router, routing paths are distributed for loads according to the comparison results, after the routing distribution is finished, effective loads send data packets to the router through set transmission paths. By the aid of the method, the Spacewire bus based plug and play function of the satellite can be implemented, and the requirements of channel design of the Spacewire bus plug and play function can be met.

The invention provides an efficient satellite SpaceWire Plug-and-Play (PnP) network topology construction method. According to the efficient satellite SpaceWire PnP network topology construction method, construction constraint of a SpaceWire network topology, constraint of nodes in a SpaceWire network, a most time-saving network construction mode of the network traversal and the like are provided. Based on the networking and data transmission characteristics of a SpaceWire bus, time consumed by traversal during initialization of the satellite SpaceWire PnP network is reduced, treatment efficiency of a satellite for coping with sudden failures is increased, design reference and basis are provided for rapid construction of the SpaceWire network on the satellite, and a certain engineering application value is obtained.

The invention discloses a plug and play method based on the SpaceWire, and belongs to the field of satellite-borne equipment self-management. The method includes the steps that firstly, SpaceWire node devices which have access to all ports in a network are detected by utilizing a network manager, the types of the SpaceWire node devices are determined, and the topological relation between the SpaceWire node devices is determined; secondly, if a new SpaceWire node device has access to one port in the network or an original device is pulled out, a route informs the network manager to trigger the network manager to launch topological information updating aiming at the port; thirdly, the network manager has access to all SpaceWire node devices in the network according to the topological relation and reads a service register of each SpaceWire node device; fourthly, source sink types of the SpaceWire node devices are judged according to source sink attributes in service information, corresponding information sink of each information source is found, and therefore source sink matching of all SpaceWire node devices can be obtained. The plug and play method is applied to plug and play of SpaceWire devices.

The invention discloses a simulation system for measuring the transmission time of SpaceWire data packets. The simulation system comprises a wormhole router module (1) with a time window, a time main control node module (2) and a terminal application node module (3), wherein the three modules construct an aerospace communication network on the basis of SpaceWire bus standard communication; the terminal application node module (3) is used for generating two types of SpaceWire data packets; the transmission time and transmission delay time of the data packets are counted in the wormhole router module (1) with the time window through simulation system synchronizing time provided by the time main control node module (2). The simulation system is used for measuring the transmission time and transmission delay time of the SpaceWire data packets on the basis of a SpaceWire bus standard, and the performance of the aerospace communication network can be improved by using the obtained time information.

The invention discloses a FDIR (Fault Diagnosis, Isolation and Restoration) processing method for a SpW (SpaceWire) network. The method comprises the following steps: in a process of performing SpW protocol encapsulation at a network source end, finishing CCSDS AOS (Consultative Committee for Space Data Systems Advanced Orbiting System) protocol virtual channel processing of valid data; after a network host end receives a SpW-RVTP (SpaceWire-Remote Virtual-Channel Transfer Protocol) data packet transmitted by the network source end, performing protocol parsing, removing a SpW protocol format from the SpW-RVTP, extracting an AOS protocol VCDU (Virtual Channel Data Unit) frame from the SpW-RVTP data packet, adding 1ACFFC1D data to construct a CADU format frame, and transmitting the CADU format frame to a physical channel; and performing FDIR processing at the network host end on the basis of the SpW-RVTP data packet. According to the method, spacecraft fault diagnosis, isolation and restoration measures are set specific to the transmission characteristics of the SpW network, so that the SpW network transmission reliability is enhanced, and the satellite-ground data transmission fault locating efficiency is increased.

The invention belongs to the field of computer vision, and provides a cascaded convolutional neural network fused with space-time clues, which is used for realizing video foreground and background separation. Therefore, the technical scheme adopted by the invention is as follows that in a video foreground and background separation method based on a cascaded convolutional neural network, two encoder-decoder type sub-networks are used to carry out video foreground and background separation; the two sub-networks are respectively an FD network for foreground detection and a BR network for background reconstruction, the FD network is used for generating a binarized foreground mask, and the BR network reconstructs a background image by using output and input video frames of the FD network; in order to introduce a space clue, three continuous video frames are taken as input; in order to improve the network applicability, the optical flow graph corresponding to the original video frame is usedas a space clue and is input into the FD network at the same time. The method is mainly applied to occasions of video foreground and background separation.

The invention provides a SpaceWire network link signal quality test system. The system comprises a SpaceWire network link level feature module, a space-borne satellite mounting test module and a signal quality test box, wherein the space-borne satellite mounting test module is connected with the quality test box through the SpaceWire network link level feature module, the signal quality test box comprises a SpaceWire connector and a signal circuit board, the SpaceWire connector is connected with a satellite node device and the signal circuit board, and a signal line test point is led out from the signal circuit board. The invention further discloses a signal quality evaluation method. According to the invention, through development of a signal switching apparatus, four DS-encoded LVDS level signals of a SpaceWire link are switched, and difference signal waveforms or signal eye patterns are detected in real time by use of an oscilloscope.

The invention discloses a SpaceWire communication network fault recovery method and system. The method comprises the steps of: when monitoring that a main communication link of a certain communication node in a SpaceWire communication network has a fault, activating a standby communication link of the certain communication node, wherein the certain communication node is redundantly connected with two or more routers; according to the link information of the standby communication link of the certain communication node, performing dynamic optimization reconstruction on the SpaceWire communication network to obtain a reconstructed route table; and configuring the reconstructed route table to a router to perform fault recovery on the SpaceWire communication network. The method and the system solve the fault recovery problem of a link disconnection error of the SpaceWire network under spatial radiation.

The invention provides a SpaceWire network time service and calibration method comprises a step 1 of enabling a satellite data processor to perform reception via multiple SpaceWire channels after a ground end gives time service; and a step 2 of performing multiple verification on time service and calibration time codes of the multiple SpaceWire channels in order to guarantee that a time code acquired at a satellite is consistent with a code word sent from the ground end. The step 2 specifically includes modifying satellite time after the time service and calibration time codes of at least two SpaceWire channels are consistent and cancelling satellite time modification if the time service and calibration time codes of at least two SpaceWire channels are inconsistent. The method performs multiple verification on the time service and calibration time codes of the multiple SpaceWire channels so as to guarantee that the time code acquired at satellite is consistent with the code word sent from the ground end.

The invention discloses a high-reliable fault-tolerant system based on a bus network. The fault-tolerant system comprises a simulation IO (Input Output) control module, an interface and switching module, an onboard flight control and integrative computation module, a high-performance processing module, a digital IO control module, a router module, and dual-redundancy isomorphic modules corresponding to above six modules; the six modules and the corresponding dual-redundancy isomorphic modules compose four network connections to realize the dual-redundancy hot backup; and thus, the fault-tolerant capacity of the dual-redundancy system is improved through the dual-ring topological structure by using the SpaceWire interconnected bus architecture. Based on a plurality of point-to-point bus interconnected bridge connections, the fault-tolerant system provided by the invention realizes the faster and stronger system fault-tolerant capability by using the dual-ring topological structure.

The invention discloses a SpaceWire bus free topology bit error rate test system and method. The method is realized based on a SpaceWire error rate testing device. Working modes of different controllers, router connection mode, the data transmission types are freely combined under various complex conditions; the error rate of the SpaceWire component is judged by measuring the error code conditionsof the data code bits of the input end and the output end of different controllers, the problem that errors such as data damage, data loss and data denaturation easily occur in the transmission process due to lack of judgment of the error rate in the prior art is solved, and the method has the advantages of being high in confidence degree and short in test time.

The embodiment of the invention relates to the technical field of information processing, and discloses a clue monitoring method and system based on diversified data fusion. The method comprises the following steps: extracting account entity information of diversified data from various data sources, and performing multi-language translation based on cloud service on the extracted various account entity information; analyzing the content texts corresponding to the various account entity information to obtain clues, and labeling the content containing the clues; analyzing and screening the transaction data in the block chain network to obtain illegal transaction information; performing association analysis on various account entity information, clues with labels and illegal transaction information to obtain network space clues, wherein the cyberspace clues comprise a plurality of transaction items and association relationships among the plurality of transaction items. According to the embodiment of the invention, the correlation between information is discovered from a diversified information carrier, so that tasks such as clue discovery, time series connection, character relationship series connection and fund flow tracking are completed.

The embodiment of the invention provides a SpaceWire network time delay real-time control and optimization method. The method comprises the steps that an optimization control node sends monitoring instruction information to a router in a SpaceWire network; in the monitoring time window, after each router completely receives data packets sent by other routers, transmission initial time informationof the data packets is obtained, transmission ending time information of the data packets is added to the data packets, transmission time delay of the data packets is determined, and the data packetsand the corresponding transmission time delay are recorded in a routing table; after the monitoring time window is finished, uploading a routing table of each router to the optimization control node by each router; and after the optimization control node receives the routing table sent by each router, the overall transmission delay of the whole SpaceWire network is calculated, and the target transmission path is optimized and adjusted according to the overall transmission delay. According to the real-time control and optimization method and system for the SpaceWire network time delay, the network transmission efficiency in the SpaceWire network can be effectively improved.

The invention relates to the technical field of bridge construction, in particular to a method and device for measuring the line shape of a bridge deck. The method comprises the following steps of: in a set moving direction, obtaining space line shape initial measurement data under an estimated coordinate system through a total station instrument, and obtaining space line shape satellite data under a bridge independent coordinate system through a global positioning receiver; according to the space linear satellite data under the bridge independent coordinate system, correcting the space linear initial measurement data under the estimated coordinate system to be under the bridge independent coordinate system to obtain space linear correction data under the bridge independent coordinate system; and correcting the space line shape correction data under the bridge independent coordinate system to the bridge center line to obtain the bridge floor center line shape under the bridge independent coordinate system. The problem that in the prior art, a coordinate system needs to be established through a rear view point with known coordinates before a total station is adopted for measurement, and field factor limitation often does not have intervisibility conditions, so that measurement is difficult can be solved.

A Data Throttling method duplicates the full-speed transmission of data so that it appears to be transmitting at a 10 Mhz rate. Additional storage elements and multiplexers are added along the data path but this completely eliminates undesirable complexity in the clock tree. In a two-bit application, data is received and transmitted two bits at a time, and yet the output 10 Mhz data rate is maintained. For an even ratio between the system clock rate and the 10 Mhz clock signal rate, bit0 is transmitted for half the time and bit1 is transmitted for the other half of the time. But if the full-speed clock rate is an odd multiple of 10 Mhz, then there will be a “split cycle” including one bit0 and one bit1.

The invention discloses an APS (Auto-Protection Switch) redundancy method based on a SpaceWire bus. The method comprises the following steps that: 1, an APS device starts working after data communication based on the SpaceWire bus is started; 2, an APS module connects two independent SpaceWire node modules, and continuously detects working states of a primary SpaceWire node and a standby SpaceWire node; and 3, the APS module transmits a switch request data code to an opposite end by a far-end failure indication signal through a standby node link when a primary node link fails in order to generate a switch signal for an APS module of the opposite end, the APS module rapidly switches a bus at the opposite end to a standby SpaceWire bus after reception of the switch signal, a standby transmitting module at the opposite end transmits a switch confirmation data code to a local end standby node at the same time, and the local end standby node generates a local switch signal for a local APS module after reception of the switch confirmation data code.

The invention relates to a fault-tolerant method and system for SpaceWire bus communication of a hitching dual-port RAM (Random Access Memory), the redundant backup design of RAM storage is realized by carrying out partition design on an RAM storage area, and a SpaceWire bus communication fault judgment mode taking RAM storage data as a center is designed according to a SpaceWire bus communication protocol format, a two-stage fault processing strategy of dual-port RAM storage area switching and SpaceWire communication controller switching is provided for the communication fault, the problem of SpaceWire communication failure is solved, and the reliability of SpaceWire bus communication hitching the dual-port RAM is improved.