671 results about "Bus network" patented technology

A modular wireless Internet access communications system designed to extend broadband 802.3 linear-bus topology up to fifteen miles beyond the physical limits of DSL or cable technologies through the integration of specialized wireless hardware devices, firmware, and protocols.

A video recording device includes the ability to record a video broadcast or video program while concurrently replaying a previously recorded video broadcast. This previously recorded video broadcast can be the same video broadcast that is recording or a different video broadcast. The record and playback operations are preferably triggered and controlled through a television on which the user can watch the playback of the recorded program. The viewer enters the data and commands for recording and playback preferably using a remote control device. Video programs are preferably recorded on a mass storage device. Preferably, the mass storage device is a hard disk drive coupled to the television through an IEEE 1394 serial bus network. Alternatively, any other appropriately configured memory device can be used to store the video programs. The television uses write commands to transmit to and record the program onto the mass storage device and read commands to retrieve previously recorded portions of a program to be replayed from the mass storage device. When playing back a previously recorded program or the recorded portions of a program which is still being recorded, the television will retrieve the packets of data from the mass storage device in sequence, using read commands to read from the appropriate locations where the appropriate packets have been stored. Each packet is then retrieved in sequence from the beginning of the program, even if the end portion of the program is still being recorded.

A method and system for interconnecting peripherals, processor nodes, and hardware devices to a data network to produce a network bus providing OS functionality for managing hardware devices connected to the network bus involves defining a network bus driver at each of the processor nodes that couples hardware device drivers to a network hardware abstraction layer of the processor node. The network bus can be constructed to account for the hot-swappable nature of the hardware devices using a device monitoring function, and plug and play functionality for adding and, removing device driver instances. The network bus can be used to provide a distributed processing system by defining a shared memory space at each processor node. Distributed memory pages are provided with bus-network-wide unique memory addresses, and a distributed memory manager is added to ensure consistency of the distributed memory pages, and to provide a library of functions for user mode applications.

An electronic traction vehicle comprising a principal power unit, a power storage unit mounted on a vehicle platform. A plurality of wheels are rotably mounted on the vehicle platform with an electric motor coupled to at least one wheel. A drive controller is coupled to the electric motor and a vehicle controller having an input and output terminal is coupled to the drive controller. A data bus network is coupled to the drive controller and the vehicle controller. An A/C bus assembly is coupled to the principal power unit, the power storage unit and the electric motor through the drive controller. Another embodiment of the electronic traction vehicle provides at least four electric motors and four drive controllers coupled to four wheels and the data bus network and A/C power bus assembly. Another embodiment of the electronic traction vehicle provides the components of the vehicle as moduled including an auxiliary module removably connected to the data bus network and the A/C bus assembly.

The portable appliance informs users about waiting times at stops in a bus network, the appliance comprising a radio receiver to receive data enabling waiting times to be determined, an interrogation keypad, a central unit for evaluating the estimated time of arrival of the next bus at a particular stop, a screen for displaying the waiting time for said bus, and a sound emitter. The central unit is designed to update cyclically the estimated time of arrival for the next bus and to actuate the sound emitter when said estimated time of arrival differs excessively from the time of arrival initially estimated the last time the appliance was interrogated by the user.

The invention relates to a combined type bionic quadruped robot controller, which is in a structure similar to a vertebrate nervous system, wherein the controller is divided into a decision layer, a planning layer and an execution layer which respectively correspond to a higher nervous center, a lower nervous center and a motor nerve of an animal. The decision layer for realizing that the robot senses the working environment and generates corresponding motion decision instructions consists of an ARM9 (advanced RISC (reduced instruction-set computer) machine 9) and an environmental information acquisition system, and a real-time operating system is embedded in the ARM9. The core of the planning layer is a walking pattern generator, and is used for planning and solving the motion parameters of each joint according to the decision instructions from the upper layer. The execution layer for controlling the current, the position and the speed of a driving motor in three closed loops consists of a motor controller using a digital signal processor as the core. Data can be effectively transmitted among the three layers in real time through a dual-port RAM (random-access memory) and a CAN (controller area network) bus network. The combined type bionic quadruped robot controller disclosed by the invention has the characteristics of high reliability, high flexibility, extension easiness and maintenance easiness, and has a broad application prospect in the technical field of bionic legged robots.

A high bandwidth DRAM is provided with two separate bus networks connecting the DRAM to a processor. One bus network is a high speed (e.g., 500 MHZ) 8:1 or 16:1 multiplexed I/O bus and the second is a slower (e.g., 64-bit) bus. The high-speed bus is used for example for graphic intensive applications which require fast access to large numbers of bits in the DRAM memory array. This of course results in higher power requirements. Since, not all applications require such large amounts of data to be transferred between the DRAM and the processor, the slower bus is provided for these less demanding applications such as word processors, spreadsheets, and the like. The slower bus requires less power to operate and therefore results in a power saving mode which, among other things, facilitates longer battery life.

The invention relates to a data acquisition and information management system and an acquisition method for a production line. The system comprises a plurality of production line information acquisition terminals, a plurality of production line information display terminals and a control center management system, wherein the production line information acquisition terminals are used for receiving a command of the control center management system and uploading the acquired data to the control center management system; the production line information display terminals are used for receiving a command issued by the control center management system and controlling the display effect of a display screen; the control center management system is used for performing communication with each acquisition terminal and display terminal to perform information interaction, saving information received from each acquisition terminal, and displaying the production line state in the form of diagram; and the plurality of acquisition terminals, the plurality of display terminals and the control center management system constitute a serial bus network. According to the system and the method, production line information can be acquired in real time, data can be analyzed and processed in real time, simultaneous delivery of a plurality of products is supported, a communication network is established in an economical and reliable industrial bus mode, and the quantity of the terminals can be increased flexibly according to the enterprise requirement and the production line layout.

The invention provides an electricity-saving method of vehicle-mounted CAN bus network, belonging to the electronic technical field. The method solves the problem that electric energy is transported to existing automobile electric equipment no matter the equipment works or not to cause electric energy waste. The electricity-saving method of the vehicle-mounted CAN bus network is as follows: a CAN bus is provided with controller modules used as nodes, and the method can lead the control modules to enter a low power consumption mode in the case of no operational requirement under program setting, can switch each controller module among various states, thereby achieving the electricity-saving purpose when the controller modules are in the low power consumption state in the case of no tasks required to be processed.

An architecture, a system and a method monitors data structures over an IEEE 1394-1995 serial bus network. The data structures are portions of entries posted and stored to a descriptor mechanism. A resource request is submitted by a requesting control device to an AV/C resource schedule bulletin board subunit, where request data is stored and posted. The requesting control device submits a corresponding notify command data frame to the AV/C bulletin board subunit. When a competing control device performs a specified type of access activity on a specified data structure, the bulletin board subunit sends a notify response frame to the original requesting control device. The notify response frame provides an alert to the original requesting control device that the specified access activity has been performed on the specified data structure by a competing control device.

The invention provides a network control method of a dual-redundancy CAN bus, which comprises five major steps: step 1: switching on a system and carrying out node initialization; step 2: detecting the initialization of the system; step 3: carrying out normal work and cycle detection; step 4: carrying out treatment of abnormality during the operation of the system; and step 5: carrying out the treatment after switching over a main channel and a standby channel. The method fully utilizes a mature CAN device for constructing a dual-redundancy bus network, carries out error detection and specifies control authorities of different nodes through application software, realizes a network control strategy of distributed monitoring and centralized management, simultaneously provides a detailed fault detection method of the CAN bus system and carries out classification on different errors, thereby being easy to realize programming and having strong universality. The network control method improves the fault-tolerant capacity of the CAN bus system and fully utilizes the redundancy mechanism to ensure the reliability of the system; and the network control method has wide practical value and application prospect in the field of mechanical and electrical control.

One or more bus bridges are used to partition a large I²C bus into smaller bus segments. By programming address bitmaps that are internal to each bridge, the various bus segments can be made to appear as one logical bus. In addition, the bus topology can be designed to maximize the ability to isolate faults within a given segment, thereby improving the ability of technicians to diagnose problems in very large I²C implementations. In one embodiment, the invention is a unidirectional bus bridge which is designed so that two such bridges can be used in parallel (facing in opposite directions) to implement a fully bi-directional bus bridge. In another embodiment, I²C slave addresses are replicated in a single logical I²C bus by addressing a tunnel command to a bridge, which command contains an address and causes the bridge to which it is addressed to forward the contained address.

The invention belongs to the technical field of mechanical-electrical integration and drive control and discloses a power-driven six-degree of freedom motion platform high-precision control system and control method. The power-driven six-degree of freedom motion platform high-precision control system comprises an embedded controller, a real-time Ethernet bus network and a driver; the embedded controller transfers a control instruction to the driver through the real-time Ethernet bus network, a power-driven cylinder is connected with a servo motor, the driver drives the servo motor directly, the servo motor drives the power-driven cylinder to perform telescopic motion, and the motion of a six degrees of freedom motion platform is achieved. The power-driven six-degree of freedom motion platform high-precision control system and control method have the advantages of being high in control real-time performance, good in motion synchronism of all branches, high in reliability, simple in structure, flexible in extension and easy to maintain. Based on the flexible software design platform, not only can the motion simulation be achieved, but also the high-precision multi-degree of freedom location can be achieved.

The invention relates to a customized bus line opening optimization method based on real-time requirements, which comprises the following steps of: establishing a customized bus network system, comprising the selection of a network node, the determination of a network path and the selection of a parking node; customizing the bus line opening conditions, including: real-time demand user informationacquisition and demand response time determination; a method for customize a bus network model and passenger classification comprise that steps of: establishing a spatio-temporal road network, determining a spatio-temporal window of passengers and classify passengers; Initial customization of bus route generation model, including establishing a Route Optimization Model with Minimum Total passenger-Operator Cost; Initial customized bus route generation algorithm is to use column generation algorithm to determine the initial customized bus route; Optimize customized bus routes that have been opened. The invention can greatly improve the flexibility of the customized bus, so that the customized bus has more advantages in the travel mode selection, thereby improving the present situation of low seating rate of the customized bus, and finally improving the share rate of the customized bus travel mode.

It is expected to provide a communication apparatus, relay apparatus, communication system and communication method for effectively performing a communication timing adjustment when a collision has occurred on a communication line, efficiently reducing the communication collision with reducing processing loads on each apparatus, for making each apparatus effectively perform the transmission timing adjustment, and for improving the communication efficiency. ECUs are connected to communication lines with a bus topology. A relay apparatus is connected to the communication lines, obtains a time distribution based on a number of messages transmitted to the communication lines. When the bias occurs in the transmission timings, the relay apparatus transmits an instruction message that instructs to perform the timing adjustment for messages transmitted between the ECUs. In addition, it is determined whether a message to be relayed is held. When it is determined that such a message is held, the instruction message is transmitted.

The invention discloses a commonly-used diagnostic test device for a vehicle. The commonly-used diagnostic test device comprises a control module, a vehicle bus communication module, a K-Line physical layer test module, a display module, an upper computer communication module, a clock module, a signal acquisition module, a storage module, a working state display lamp, an alarm module and a power module. The control module is used for analyzing and processing data, the vehicle bus communication module is connected with the control module and conducts data exchange, the upper computer communication module and the clock module are connected with an upper computer, the signal acquisition module is connected with the control module and transmits data to the control module, the storage module, the working state display lamp and the alarm module are connected with the control module, and the power module supplies power to all the modules. According to the commonly-used diagnostic test device, a performance test, a functional test and a diagnostic test can be conducted on a finished vehicle vehicle-mounted control unit, a diagnostic function test based on a bus network can be achieved, and a bus communication protocol and a diagnostic protocol are tested. The commonly-used diagnostic test device is high in universality, various vehicle models can be diagnosed, cross-platform vehicle models can be diagnosed, and the finished vehicle bus network can be diagnosed.

This invention relates to auto-control field, which in detail is used to a wireless LAN on-site bus net control station. It comprises main control station and I/O module, wherein, its main control station runs the wireless LAN on-site bus agreements and accomplishes the distribution I/O control through I/O module controller and receives and transmits data to Ethernet through wireless LAN transmission module. The I/O module is to accomplish the collection and conversion of the on-site signals. It is based on intelligence control device of the wireless Ethernet and turns the DCS total distributed system structure into new type of total distribution structure to completely distribute the control into the on site by network control station. This invention especially applies to old industry control system reconstruction to make it possible for old enterprises to enter the new time of on-site bus.

A differential bus network, in general, or a controller area network (CAN) driver, in particular, controls and minimizes the variation on the common-mode signal of the CAN bus. This CAN driver also provides improved symmetry between its differential output signals, CANH and CANL, and provides protection for its low voltage devices from voltage transients occurring on its output lines. The common-mode signal is sensed and buffered, then during the dominant to recessive transition, the bus signals are shorted to the buffered common mode voltage. Specifically, additional switches or transistors are used to pull the differential output signals, CANH and CANL, to the common mode signal V_CM when the state of the CAN bus transitions from dominant to recessive. This improvement minimizes high frequency spikes in the common-mode signal and eliminates DC shifts during transitions of the state of the CAN bus. A driver system may include a plurality of CAN drivers are serially interconnected to form a driver system, wherein each downstream driver stage receives a time-delayed form of the digital input signal TxD, each stage providing a time-delayed contribution to the differential output signals of the overall driver system.

Failure isolation in a distributed processing system of processor nodes coupled by a multi-drop bus network. The processor nodes have information of relative locations of the processor nodes on the network, and have an associated local error indicator, such as a character display. Each node independently tests access to other nodes on the network, and upon detecting a failure to access one or more nodes, determines, from the relative locations, the node having failed access which is closest. The failure detecting processor posts, at its associated local error indicator, an identifier of the closest failed access node. A user may inspect the local error indicators and thereby isolate the detected failure.

The invention discloses an intermittent reactor control system based on a control variable parameterization method. The system comprises an intermittent reactor, and a temperature sensor, an analog to digital converter, a site bus network, a DCS (distributed control system), a main control chamber and product concentration status display which are arranged at the end of the intermittent reactor, and a digital to analog converter and a temperature control valve which are arranged at the end of the intermittent reactor. After duration of production process, initial concentration status of materials in the reactor and a target product required to increase concentration are determined by an engineer in a control chamber, the DCS acquires a temperature control strategy to enable the target product concentration to be maximum, converts the temperature control strategy into an open command for a temperature control valve, transmits the open command to the digital to analog converter at the end of the intermittent reactor through the site bus network, and enables the temperature control valve to act according to received control commands. The temperature sensor collects the temperature of the reactor in real-time and returns to the DCS to enable the engineer in the control chamber to master the production process timely. By the aid of the intermittent reactor control system, concentration of the target product can be maximized, and potential synergies are realized.

The present invention relates to a method and apparatus for controlling data transfer and power supply to at least one load device (61-64) connected to a two-wire data communication cable (70) in a bus-type structure. Power supply and data transfer are multiplexed via the two-wire data communication cable so that a standard coaxial cable can be used for shared power and data transport, enabling the operation of lighting applications or other applications in retail and office, based on cheap, flexible, preconfigured cables in a bus topology and using known chipsets.

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 discloses an on-board OTA upgrading method based on CAN bus load monitoring. The on-board OTA upgrading method comprises steps that all of internal electronic control units ECU are divided into different upgrading types according to function safety types, and are stored in a memory of an on-board OTA terminal in a form of data table; the on-board OTA terminal is used to receive the upgrading files and the upgrading types of the ECU, is used to search the data table in the memory, is used to select the upgrading types, and is used to determine whether the on-board OTA upgrading based on the CAN bus load monitoring is carried out or the upgrading is carried out during parking of a vehicle and in a dormant state of a vehicle bus network. The on-board OTA upgrading method based on the CAN bus load monitoring is advantageous in that by classifying the internal electronic units ECU, calculating a CAN bus network load rate, and determining an upgrading condition, an ECU upgrading process is simplified, internal bus network bandwidth is utilized in a maximized way, and loss of an on-board storage battery is reduced.

The invention discloses a 1553B bus network emulation system applied to a spacecraft system, which belongs to the field of aerospace and computer emulation. The 1553B bus network emulation system comprises a 1553B bus, the Ethernet, a bus network tester, a bus terminal tester, a digital phosphor oscilloscope, a bus separation switch, an emulation terminal, a bus system performance estimation computer and a bus interface control file configuration computer, and is used for emulating and analyzing the information transmission and system running of an actual spacecraft bus system. The 1553B bus network emulation system replaces conventional cable connection with a 1553B bus network, realizes the digitalized transmission and comprehensive utilization of network system information and improves the reliability and electromagnetic compatibility of the system by equipment with standard digital interfaces in combination with Ethernet communication, meets 1553B specifications, realizes coexistence in one network emulation system, can be used for a plurality of stages of analysis, development, test and the like of the spacecraft system and is of great importance to researches on the reliability of the actual spacecraft system.