8538results about "Bus networks" patented technology

A system receives vehicle metric data from a gateway device connected to a vehicle. The vehicle gateway device gathers data related to operation of the vehicle and / or location data. The system receives data from multiple vehicles in a fleet. The vehicle gateway device gathers vehicle metric data at a high frequency. Instead of transmitting a large amount of vehicle metric data at a fine level of granularity, the vehicle gateway device aggregates and buckets the vehicle metric data over a period of time (such as, every five minutes). The system uses the bucketed data for fleet management analysis.

The invention provides a multilevel caching method and system based on CAN bus communication, and is applied to the field of data transmission. According to the method, the influence coefficient of the CAN bus is obtained by presetting load scenes (idle, low load and high load), whether the influence coefficient is limited by hardware is judged, the optimization direction is ensured to be accurate, data cache management is performed by adopting an annular buffer area, and the data transmission interval is dynamically adjusted and the data packaging strategy is optimized (small data merging, data alignment and filling byte reduction), so that the data transmission efficiency is improved. The CAN ID priority is dynamically adjusted by collecting communication data category information, it is ensured that high-priority data (such as ECU control signals) are transmitted in time, bandwidth occupation of low-priority data is reduced, in addition, the processing response speed of data frames is monitored, and if the processing response speed does not reach the standard, the data sending frequency is optimized, and the real-time performance is improved.

The invention relates to the technical field of civil engineering safety monitoring, and discloses a multi-sensor fusion scaffold intelligent monitoring and early warning system and method, and the method comprises the steps: deploying a multi-source sensor group at a scaffold key node, collecting data in real time, carrying out the noise reduction fusion processing through an edge calculation module, and constructing a dynamic deformation feature vector; inputting a time sequence prediction model; a self-feedback adjusting unit is triggered to drive an executing mechanism to conduct deformation compensation, and data optimization control parameters are fed back in real time; and based on the compensated deformation state, the remote platform generates a hierarchical maintenance decision and synchronously pushes the hierarchical maintenance decision to the terminal. According to the invention, all-dimensional sensing of deformation, load and environmental parameters of the bridge supporting scaffold is realized through heterogeneous sensor cooperative networking and redundancy check. Local monitoring blind areas can be eliminated, cross validation of a physical model and a data driving algorithm is combined, the reliability of deformation monitoring and the robustness under environment interference are remarkably improved, and more comprehensive data support is provided for construction safety.

The invention provides an intelligent network connection automobile abnormity detection system and method based on big data analysis, and the method comprises the steps: obtaining metadata in the communication between a vehicle CAN bus and a cloud, the metadata comprising a protocol type and a load feature, carrying out the analysis of the load feature according to the protocol type, and extracting a key field of a data package; constructing a load feature matrix according to the key field, and normalizing the heterogeneous data to obtain a feature data set in a uniform format; a mahalanobis distance algorithm is adopted to calculate the distance between each data point in the feature data set and a preset base line, and if the distance exceeds a preset threshold value, abnormal traffic is judged, and an abnormal traffic mark list is generated; fingerprint features of a transmission link are obtained from the 5G network slices, the fingerprint features of different slices are subjected to standardization processing, and a cross-slice consistent fingerprint feature data set is generated; therefore, security threats in a complex Internet of Vehicles environment can be effectively handled, and the accuracy and reliability of abnormal traffic detection are improved.

The invention belongs to the technical field of vehicle-mounted upgrading control, and particularly relates to a vehicle-mounted entertainment system upgrading method and system based on Flash CAN, the method comprises the steps of hardware preparation, firmware updating file obtaining and upgrading, the upgrading process comprises the steps that current vehicle-mounted entertainment system firmware is backed up, the downloaded firmware updating file is verified, the next step is continued if verification succeeds, and the next step is continued if verification succeeds; and if the verification fails, the firmware update file is downloaded again, a specified Flash storage area is erased, the upgrade management module requests and transmits a data packet of the firmware update file to the embedded control unit, and if the request or the transmission fails, the upgrade management module rolls back to an original system, and the steps of data receiving and verification, restarting and verification are carried out, and verifying whether the functions of the vehicle-mounted entertainment system are normal. According to the invention, the risk of upgrade failure is reduced, the upgrade efficiency is improved, the security of the system is enhanced, and the system abnormity caused by improper upgrade is effectively avoided.

The invention provides a bus network data transmission control method based on priority scheduling, which relates to the technical field of network data transmission, and comprises the following steps: dividing a bus network into an edge layer, a core layer and a terminal layer; the terminal layer comprises a plurality of actuator nodes; performing priority classification on the terminal data set in the edge layer; distributing a transmission time slot of priority rating data on the core layer based on a preemptive scheduling algorithm; a priority data transmission strategy is dynamically adjusted in combination with the dynamic time slot allocation table and the local load state; and when a plurality of actuator nodes initiate transmission requests at the same time, outputting a final transmission sequence according to a priority data transmission strategy. Through a static rule base and a dynamic correction mechanism, key data features are accurately identified, the real-time performance and reliability of high-priority data are ensured, and the key business delay risk is reduced. Intelligent allocation of bandwidth resources is achieved through a preemptive scheduling algorithm, real-time service requirements are guaranteed to the maximum extent, and the network throughput efficiency is remarkably improved.

A system and method including a vehicle having a first network zone and a second network zone of a different type than the first network zone; a converged network device (CND) interposed between the first network zone and the second network zone, the CND including a policy manager circuit structured to interpret a policy comprising a network regulation description; a configuration circuit structured to configure a first network interface circuit in response to the network regulation description; and where the first network interface circuit is structured to regulate communications between end points of the first network zone and end points of the second network zone.

The invention provides a multichannel data transmission control method based on a bus network, and relates to the technical field of communication data transmission. The method comprises the following steps: acquiring a data priority list, and dynamically adjusting weight distribution by using an incremental learning algorithm to obtain a priority sequence of each piece of data; dividing the network bandwidth into a plurality of logic channels, and controlling the data transmission of each logic channel; designing a scheduling algorithm, and carrying out conflict arbitration on the competing transmission data packets; and obtaining network state data to detect the integrity of data transmission. According to the invention, through intelligent scheduling and dynamic adjustment, adaptive optimization of the system is realized. Compared with the prior art, the bandwidth utilization is optimized, the transmission efficiency is improved, obvious advantages are shown in the aspects of stability and success rate of data transmission and user experience, and a reliable solution is truly provided for modern data network management.

The invention discloses an unmanned aerial vehicle networking method and system based on an open source gap system and a soft bus. The method comprises the following steps: determining a target application scene and a target function demand of the unmanned aerial vehicle networking system; designing a special operating system for the unmanned aerial vehicle and a soft bus communication protocol stack; developing an intelligent collaborative operation algorithm and a modular architecture; integrating an intelligent collaborative operation algorithm and all functional modules in the modular architecture to the unmanned aerial vehicle platform, and performing function test and performance optimization on the unmanned aerial vehicle platform according to a preset test mode to obtain an unmanned aerial vehicle networking system meeting requirements; and verifying the effect of the unmanned aerial vehicle networking system in the target application scene, collecting verified feedback information, and performing iterative optimization on the unmanned aerial vehicle networking system according to the feedback information. The invention aims to realize autonomous networking, collaborative operation, flexible expansion and intelligent management of the unmanned aerial vehicle cluster by integrating the cross-device collaborative capability of the open-source Gawan system and the efficient communication mechanism of the soft bus.

The invention relates to the technical field of vehicle network control, in particular to an efficient vehicle network control system and method based on CAN-FD, and the system comprises a data transmission optimization module, a bandwidth management module, a signal scheduling control module, an encryption security control module and an anomaly detection module. In the invention, the bit rate of a data frame, the length of a data packet and the proportion of filling bytes are optimized, the transmission efficiency is improved, the bandwidth occupied by invalid data is reduced, a priority screening mechanism is called, the stable transmission of high-priority signals is ensured, the bandwidth allocation is adjusted based on the flow state and node frequency monitoring, the burst flow congestion is relieved, and the resource allocation is balanced; in combination with arbitration priority and bus conflict state, non-emergency signal priority is optimized, key data blocking risk is reduced, encryption and integrity verification are adopted, data security is ensured, tampering and leakage are prevented, data abnormity score and detection are introduced, abnormal data are screened, identification capability is improved, and network potential safety hazard is reduced.

The invention relates to the technical field of vehicle-mounted communication, and discloses a CAN network-based vehicle-mounted equipment data transmission and interaction method, which comprises the following steps of: S101, acquiring a message sent by vehicle-mounted equipment, and analyzing to extract vehicle operation data; s102, receiving the vehicle operation data by the CAN gateway controller, extracting signal content, performing classification optimization, and performing compression packaging; s103, sending the packaged vehicle operation data to an external terminal device; s104, the external terminal device receives and analyzes the packaged vehicle operation data; and S105, the remote terminal sends an encrypted control instruction to the vehicle-mounted gateway, the gateway verifies the encrypted control instruction, converts the encrypted control instruction into a CAN message and executes the CAN message, the ECU generates a feedback signal and returns the feedback signal, and the gateway feeds the feedback signal back to the remote terminal through wireless communication to complete closed-loop interaction. According to the invention, the real-time transmission of safety key data is ensured, and the stability of wireless communication is improved.

The invention relates to the technical field of data acquisition, in particular to a multi-source heterogeneous bus data acquisition protocol configuration method, which realizes protocol identification and structure analysis of CAN (Controller Area Network), Modbus and Ethernet / IP (Internet Protocol) bus data by dynamically compiling protocol source codes and registering analysis classes, and comprises the following steps of: extracting protocol feature information from a data stream; the method comprises the following steps of: calling a corresponding protocol analysis class to perform recursive analysis, and executing parameter analysis and mapping, in addition, defining a new protocol semantic feature and dynamically generating a protocol analysis plug-in through an XML (Extensible Markup Language) configuration file to realize protocol semantic-level custom extension, adopting source code level dynamic compilation and plug-in design, supporting a new protocol plug-and-play mode, and being high in practicability. System codes do not need to be modified and redeployed, and the flexibility and expandability of the system are effectively improved.

The invention relates to a cross-network time synchronization method oriented to AUTBUS and TSN fusion, and belongs to the field of network time synchronization. The invention aims to solve the problems that the traditional Ethernet cannot meet the time-sensitive application requirement and the scale of the TSN is limited and the like. According to the method, a time compensation value prediction algorithm is placed in an AUTBUS terminal, time delay values of all parts in the heterogeneous network are collected and predicted, and finally a prediction result is compensated to a local clock of the AUTBUS terminal, so that end-to-end time synchronization of the AUTBUS and TSN fusion network is realized. The method comprises the four steps of TSN intra-network time synchronization, gateway intra-network time synchronization, AUTBUS intra-network time synchronization and AUTBUS terminal time compensation, time delay data are predicted through a linear regression prediction algorithm, and synchronization precision and efficiency are improved. The method is suitable for the fields of intelligent manufacturing, industrial automation and the like, and an effective solution is provided for time synchronization of the heterogeneous network.

A system and method, including a vehicle having at least one network zone; a converged network device (CND) interposed between the at least one network zone and at least one of an external communication portal or a first external device, the CND including a policy manager circuit structured to interpret a policy comprising a network regulation description, wherein the policy is communicated to the CND from a second external device; a configuration circuit structured to configure a gatekeeper interface circuit in response to the policy; and the gatekeeper interface circuit, wherein the gatekeeper interface circuit is structured to regulate communications between end points of the at least one network zone and the at least one of the external communication portal or the first external device.

The invention relates to the technical field of vehicle-mounted communication, and discloses an intelligent identification and conversion method for a heterogeneous vehicle-mounted connector protocol. According to the method, after a vehicle-mounted connector is connected, preset disturbance signal sequences are sequentially injected, response behaviors of the preset disturbance signal sequences in a signal channel are recorded, and a corresponding response sample set is constructed by analyzing response level, time delay and feedback data. The system further archives and encodes the sample set, generates a disturbance response behavior track containing state jump characteristics, and reasones a communication protocol type and a corresponding state driving factor through track comparison. On the basis, a field stable region and a boundary change mode are extracted, a protocol adaptive sampling rule is generated, then real-time segmentation and extraction are carried out on subsequent communication data, and a standardized data frame is constructed. Finally, data format reconstruction and semantic conversion among heterogeneous vehicle-mounted protocols are realized, and communication compatibility and data intercommunication capability among various connectors are improved.

A system and method, including a vehicle having a first network zone and a second network zone; a converged network device (CND) interposed between the first network zone and the second network zone, the CND comprising: a policy manager circuit structured to interpret a policy comprising a network regulation description, wherein the policy comprises a default policy value; a configuration circuit structured to configure at least one network interface circuit in response to the external data routing description and the external data service description; the at least one network interface circuit, wherein the at least one network interface circuit is structured to regulate communications between end points of the first network zone and end points of the second network zone.

The invention provides an Internet of Vehicles vulnerability management method, system, device and medium based on a block chain, and relates to the technical field of vehicle networks, the method can comprehensively identify potential safety risks of vehicles through a dynamic and static combined vulnerability detection mechanism, and generates a structured vulnerability report; hash abstract chaining evidence storage is performed on key data of reports and subsequent repair links by using a block chain, so that the whole process of vulnerability discovery, analysis and repair is ensured not to be tampered and traceable, and the authenticity and credibility of data are improved; the integrity of the report is verified at the cloud end, and an AI analysis engine is combined to associate a CVE database and threat intelligence, so that intelligent generation and decision support of a repair scheme are realized; the hash abstract on the chain of the OTA patch is verified at the vehicle end, so that the credibility of the patch source and the integrity of the content are guaranteed; and finally, through feedback of an installation result and secondary uplink archiving, complete closed-loop management from vulnerability discovery to repair verification is formed.

A system and method for interpreting a policy comprising a network usage permission description; configuring a first network interface circuit in response to the network usage permission description; and regulating communications, using the first network interface circuit, between end points of a first network zone of a vehicle and end points of a second network zone of the vehicle.

A system and method, including a vehicle having a first network zone and a second network zone of a different type than the first network zone; a policy manager circuit structured to interpret a policy comprising an external data routing description and an external data service description; a configuration circuit structured to configure a gatekeeper interface circuit in response to the external data routing description and the external data service description; the gatekeeper interface circuit interposed between the first network zone and at least one external communication portal selectively couplable to an external device; and wherein the gatekeeper interface circuit is structured to regulate communications between end points of the first network zone and the at least one external communication portal, and to regulate communications between end points of the second network zone and the at least one external communication portal.

Protocol detection circuits for detecting the field device protocol of a field device attached to a channel having a data line are sequentially connected to the data line by a controller that communicates to the field device through the protocol detection circuits. The protocol detection circuits are disconnected from the field device after protocol detection is completed. The channel may be one of a number of channels; the controller may also connect and disconnect the protocol detection circuits from the one channel whereby the protocol detection circuits can be used with any channel. After the protocol of the field device is identified a protocol adapter can be inserted into the channel to enable data conversion between the field device protocol and an another protocol used by the channel for data transmission.

The invention discloses a CAN bus intrusion detection method based on adaptive unscented Kalman filtering, and the method comprises the steps: obtaining real-time message data, and carrying out the preprocessing of the real-time message data, and obtaining a time sequence feature vector; constructing a nonlinear state space model based on the time sequence feature vector; performing unscented Kalman filtering state prediction based on the nonlinear state space model; inputting the time sequence feature vector as an actual observation value, calculating a Kalman gain to correct an unscented Kalman filtering state prediction result, and outputting a state estimation residual error; dynamically updating a process noise covariance matrix through exponentially weighted moving average based on the state estimation residual, and adjusting a measurement noise covariance matrix according to the measurement innovation sequence; calculating the mahalanobis distance of the state estimation residual error, comparing the mahalanobis distance with a self-adaptive anomaly detection threshold value, and judging whether an intrusion behavior occurs or not; and if the abnormal score exceeds a threshold value, triggering a multi-level alarm mechanism, recording a suspicious message and executing a safety protection operation.

An example system includes a vehicle having a first network zone and a second network zone of a different type than the first network zone and a converged network device (CND) interposed between the first network zone and the second network zone. The CND includes a policy manager circuit structured to interpret a policy comprising a network regulation description and an external communication permission value; a configuration circuit structured to configure at least one network interface circuit in response to the policy and to configure at least one gatekeeper interface circuit in response to the policy; the at least one network interface circuit structured to regulate communications between end points of the first and second network zone; and the gatekeeper interface circuit configured to regulate communications between end points of at least one of the first network zone or the second network zone and an external device.

The invention discloses an AGV (Automatic Guided Vehicle) scheduling system based on a soft bus protocol of a swan gap system and star flash wireless communication, and relates to the technical field of AGV scheduling planning, the AGV scheduling system comprises an AGV scheduling management center, and the AGV scheduling management center is in communication connection with a task management module, a communication connection management module, a global task collaborative planning module and a visual interaction module; and the task management module is used for receiving task requests, classifying, sorting and distributing tasks, and dynamically adjusting task priorities according to real-time production requirements and AGV states. According to the invention, low-delay and high-reliability communication between AGVs and between the AGVs and the scheduling management center is realized by the AGV scheduling system through a soft bus protocol of the swan Mongolian system and a star flash wireless communication technology, the communication delay is effectively reduced, the communication interruption caused by electromagnetic interference is avoided, the real-time performance of task scheduling and path planning is ensured, and the service life of the AGV scheduling system is prolonged. A solid guarantee is provided for stable operation of the AGV, and the overall response speed and reliability of the system are remarkably improved.

Example positioning methods and apparatus are described. One example positioning system includes a first global navigation satellite system (GNSS) antenna, an in-vehicle communication apparatus, and a controller. The first GNSS antenna is configured to obtain satellite data, and transmit the satellite data to the in-vehicle communication apparatus. The in-vehicle communication apparatus is configured to determine first positioning information based on at least one of the satellite data or first inertia measurement unit (IMU) data, and transmit the satellite data to the controller. The controller is configured to determine second positioning information based on the satellite data and second IMU data. Precision of the second positioning information is higher than precision of the first positioning information.

The invention relates to the technical field of signal encryption, in particular to an aviation data bus signal encryption method and system based on a field programmable gate array (FPGA), which comprises the following steps of: based on input three-dimensional tensor signal data, extracting slices from a time index of an aviation data bus according to a fixed interval, progressively sequencing amplitudes of signal channels, and then segmenting; according to the method, through processing logic of matrix decomposition and feature curve generation, the feature extraction and dimension reduction process is optimized, the distinction degree and the expression capacity of feature information are improved, the randomness and the anti-cracking capacity of a key are enhanced through a key generation mode combining a dynamic disturbance factor and an encryption parameter, and the safety of signal transmission is guaranteed; through combination of amplitude superposition and frame-by-frame storage, dynamism and high efficiency of a signal encryption process are realized, signal tampering and eavesdropping risks are reduced, and through feature reconstruction and point-by-point matching processing in a decryption stage, accurate restoration of signal amplitude is ensured, and data integrity and anti-interference capability are guaranteed.

The invention discloses a multi-device collaborative management and optimization system based on a soft bus, and the system comprises a device access recognition module which is used for scanning known devices and unknown devices through the soft bus and a plurality of communication protocols, and configuring a drive program; the collaborative task scheduling module is used for receiving a task request sent by a user, obtaining a task allocation scheme according to the task request and the comprehensive score of the access equipment, monitoring the execution condition of the task allocation scheme and performing dynamic adjustment; the resource management optimization module is used for endowing a resource attribute value to the access equipment and optimizing a task allocation scheme in combination with the task request; the security protection module is used for verifying identities of the access equipment and the user, performing encryption and integrity verification on transmission data, performing classified storage, and monitoring a security state of the access equipment; and the user experience enhancement module is used for setting a unified operation interface and dynamically adjusting the operation interface to realize synchronous execution of equipment tasks and unified display of prompt information. And the multi-device cooperation capability and the user experience are improved.

The invention provides a CT acquisition control communication system and method based on hybrid networking of multiple communication modes. The CT acquisition control communication system comprises a CT stator part communication subsystem, a CT rotor part communication subsystem and a master control PC. The master control PC comprises an upper computer, is operated through a visual interface and is responsible for task scheduling, scanning protocol setting, parameter configuration, data processing, patient registration, working state monitoring and image reconstruction of the whole system; the CT stator part communication subsystem comprises a lower computer core control module, a first WIFI module, a first switch, a rack control module, a patient bed control module, a power management module and a control handle; and the CT rotor part communication subsystem comprises a data acquisition and pay-off control module, a second WIFI module, a second switch, a collimator control module and a detector data acquisition and processing module. According to the invention, the overall communication efficiency and stability of the CT system and the expandability of the communication network can be improved, and the later maintenance cost of the communication system is reduced.

A method of operating a plurality of communications nodes in a 10BASE-T1S Ethernet network. The plurality of communications nodes are configured to implement a physical layer collision avoidance, PLCA, process. At least two of the communications nodes are candidate beacon generators. The method comprises: for each of the at least two candidate beacon generators, determining a time delay since a last received beacon, comparing the determined time delay with a threshold value associated with the candidate beacon generator, and if the time delay exceeds the threshold value then setting that candidate beacon generator as an in-use beacon generator; and the in-use beacon generator transmitting a beacon to define the start of a PLCA cycle, thereby triggering a transmit opportunity for each of the other communication nodes.

A unidirectional USB-C to PoE converter for power with bidirectional data, which includes a USB-C interface to receive and transmit USB-C power and USB-C data, a PoE interface to receive and transmit PoE power and Ethernet data, an USB / Ethernet data converter configured to transpose the USB-C data from the USB-C interface to the PoE interface and vice versa by determining communication protocol therein between and processing incoming USB-C data signals into Ethernet data formats and vice versa, a USB-C PD controller configured to control the USB-C power to charge a device connected to the PoE interface, a power converter used to boost up USB-C voltage of the USB-C power to fit PoE voltage, and a PoE interface controller configured to receive and deliver the USB-C voltage been boosted to the POE interface.

The invention provides a vehicle-mounted multi-communication protocol test mainboard, and the mainboard comprises a CANFD communication module which is used for transmitting a test frame to a to-be-tested device under the condition that a CANFD test instruction is received; receiving a response frame corresponding to the test frame sent by the to-be-tested device; the vehicle-mounted Ethernet communication module is used for converting the standard Ethernet test signal into a vehicle-mounted Ethernet test signal and sending the vehicle-mounted Ethernet test signal to the equipment to be tested; receiving a vehicle-mounted Ethernet response signal which is sent by the equipment to be tested and corresponds to the vehicle-mounted Ethernet test signal, and converting the vehicle-mounted Ethernet response signal into a standard Ethernet response signal; the processor module is used for generating a CANFD test instruction and a standard Ethernet test signal; and generating an equipment test report of the to-be-tested equipment according to the response frame and the standard Ethernet response signal. According to the invention, the CANFD communication module and the vehicle-mounted Ethernet communication module are integrated, and the processor module is matched to carry out coordination control, so that automatic joint testing of different communication protocols is realized.