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3996 results about "CAN bus" patented technology

A Controller Area Network (CAN bus) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each others' applications without a host computer. It is a message-based protocol, designed originally for multiplex electrical wiring within automobiles to save on copper, but can also be used in many other contexts.

Smart home monitoring system based on home service robot

The invention relates to the technical field of smart monitoring, in particular to a smart home monitoring system based on a home service robot. The smart home monitoring system comprises a remote monitoring terminal, a wireless sensing control device and the home service robot. The remote control terminal is in communication with the home service robot through a network and controls the home service robot to conduct all-dimensional video monitoring. The wireless sensing control device is in interaction with the home service robot and is in charge of monitoring and collecting various home environment data and reporting the data to the remote monitoring terminal. The home service robot comprises a core control device, a chassis moving device and a sensing execution device, and the core control device is connected with the chassis moving device and the sensing execution device respectively through CAN buses to acquire the moving state of the robot, sense outside environment information, control moving of the chassis moving device, and control and monitor home appliances. Through the home service robot, regular inspection to the home environment and targeted monitoring over an abnormal target area are achieved, and remote monitoring is achieved.

Battery management system of vehicle-mounted lithium power battery

The invention discloses a battery management system of a vehicle-mounted lithium power battery. The system includes a master control unit and slave control units. The master control unit is in communication connection with the multiple slave control units through a data bus. The master control unit is in connection with battery groups, the total voltage and total current of which are acquired. The master control unit is also connected to a DC power supply, and is in connection with a charger through an external CAN bus. The master control unit mainly includes: a master microcontroller module, a total voltage detection module, a total current detection module, a battery system insulation detection module, a battery operating environment temperature detection module, a relay driving module, a data storage module, a bus communication module, an isolated power supply module, and a physical interface module of power supplies, data, signals, etc. The system provided in the invention has the advantages of simple structure, strong expansibility, and adaptability to different numbers of batteries. Being fully functional, the system has the functions of temperature control, equalization processing, battery performance evaluation, and battery self-protection, etc.

Intelligent control method of driverless vehicle tracking desired trajectory

The invention discloses an intelligent control method of a driverless vehicle tracking a desired trajectory. The method is characterized by comprising the following steps of: establishing a body coordinate system, and determining the position information of the vehicle; calculating a membership degree function of a road curvature characteristic according to a radian value, and defining a fuzzy rule to calculate a decision output speed; according to the distance the vehicle runs for 1.5-2.5 seconds, searching for the trajectory points larger than the distance and closest to the vehicle in the coordinate sequence of the desired trajectory; calculating the moving curvature of the vehicle according to an adaptive proportion-differential-integral control algorithm formula; and finally judging whether the target point of the current control cycle is the last point selected from the road point sequence; if so, outputting a signal to a brake servo control system to start the brake to slow down the vehicle; otherwise, outputting a voltage signal by a controller local area network module to keep and control the accelerator opening so that the vehicle continues proceeding. Through adoption of the intelligent control method, the driverless vehicle can realize a function of tracking the desired trajectory, and has certain adaptability to the change of the road curvature characteristic.

Split type direct-current charging piles for electric automobiles, system and method

The invention discloses split type direct-current charging piles for electric automobiles, a system and a method. The split type direct-current charging piles for the electric automobiles are in parallel connection to an alternating-current terminal; bus-bars are sequentially connected to one another by charging modules in charger screens of the split type direct-current charging piles through parallel contactors so as to form a loop; a master control module, a front acquiring module and a rear acquiring module of each split direct-current charging pile are connected to one another through a CAN (controller area network) bus; electric energy intelligent load distribution is implemented through the rear acquiring modules by control on switching-off of the parallel contactors; and each charging module is communicated with the master control module of the corresponding direct-current charging pile through a CAN bus, is in parallel connection with a normally open contact of a corresponding intermediate relay and is connected with the adjacent charging modules so that a CAN communication loop is formed. Each charging module is connected with the master control module of the corresponding direct-current charging pile which requires power allocation through the corresponding intermediate relay when responding power allocation; and centralized control is implemented. Moreover, a charging combination mode is flexible, the synthetic cost is low, and the utilization ratio of the charging modules is high.

Robot control system and method based on principal and subordinate teleoperation mechanical arm

InactiveCN103273489ADoes not affect the additionDoes not affect deletionProgramme-controlled manipulatorData displaySystems engineering
The invention discloses a robot control system and method based on a principal and subordinate teleoperation mechanical arm. The robot control system comprises a principal mechanical arm and information collection plate, a monitoring center PC, a robot principal control panel, a subordinate mechanical arm and FPGA movement control panel and a site environmental information collection plate. The robot control method includes the steps of principal mechanical arm manufacturing and data collection, the control of a subordinate mechanical arm, a trolley and a cradle head, video collection and communication of the robot principal control panel, data collection and communication of the site environmental information collection plate and data display and communication of the monitoring center PC. Under the condition that the complexity of a system is not added, the mechanical arm can be controlled to achieve relatively complex movement. A modularized mode is designed to be used, and modules are in communication through CAN buses. An FPGA is used as a movement control panel, establishing and updating of the system are convenient, and the stability of the system is improved. A robot transmits the video information of a working site and the environmental information of the working site to a monitoring center so that the robot can be controlled to complete more complex operations.

Method for testing electro-magnetic compatibility of automotive CAN (controller area network) buses based on semi-physical simulation

ActiveCN102707170AUnderstanding Electromagnetic CompatibilityMake up for incompletenessElectrical testingArea networkBusiness forecasting
The invention provides a method for testing electro-magnetic compatibility of an automotive CAN (controller area network) bus based on semi-physical simulation, belonging to the technical field of design and development of electro-magnetic compatibility of an automobile. The method comprises the following steps: step 1. building an automotive empty shell table frame of which the full size is 1:1 according to the actual situation of the electro-magnetic compatibility of the automobile; step 2. simulating and injecting the interference signals; step 3. monitoring the response of the automotive CAN bus on the interference signals; step 4. estimating the EMC (electro-magnetic compatibility) property of the CAN bus by using an estimating system; and step 5. observing the electro-magnetic compatibility of the automotive CAN bus in real time. With the adoption of the method, the shortcoming of the traditional method for testing the electro-magnetic compatibility of the automotive CAN bus is made up. Based on a forecasting platform of the semi-physical simulation of the electro-magnetic compatibility, research staff can implement the electro-magnetic compatibility design at various development stages such as the scheme formulating, sample manufacturing, sample testing, and testing of the system, so that the problems that the traditional electro-magnetic compatibility design is not complete and the electro-magnetic compatibility rectification has no effect can be solved.

Vehicle active collision avoidance system based on VII support

The invention discloses a vehicle active collision avoidance system based on VII support, comprising a short-distance wireless communication terminal, a road side base station and a traffic information service center, wherein, the short-distance wireless communication terminal is installed in a vehicle; the vehicle-mounted short-distance wireless communication terminals of the vehicles in local road sections form a wireless communication local area network; a road side base is arranged at a road side, various sensors arranged on the vehicle obtains the data information through uploading and collecting by CAN buses; the short-distance wireless communication terminal is provided with a danger warning information publisher; when the dangerous condition such as potential rear-end collision and the like exists, the danger warning information publisher is activated; the danger warning information is published in a broadcast manner through the short-distance wireless communication; after the short-distance wireless communication terminals on other vehicles receive the danger warning information, a central controller safety status judgment module analyzes the critical following distance required in preventing rear-end collision with abnormal running vehicles in a current running state. The vehicle active collision avoidance system of the invention can effectively reduce time delay and improve reliability.

Method for safety communication of ECUs (Electronic Control Unit) in CAN (controller area network) bus

The invention discloses a method for safety communication of ECUs (Electronic Control Unit) in a CAN (controller area network) bus, which comprises the steps that: 1, a system model is established; 2, an GECU (Gateway Electronic Control Unit) loads a session key into a safety storage of the GECU; 3, the GECU carries out session key distribution on each ECU in the CAN bus; 4, a receiver ECUr carries out authentication on an encrypted data frame sent by a sender ECUs; 5, the GECU updates an encryption key and an authentication key which are used for communication, wherein update is mainly divided into two stages of in-vehicle ECU key update and key update when a connection of external equipment is released; and 6, when a vehicle is connected with the external equipment, designing an additional authentication and key distribution method so as to ensure legality of the accessed external equipment. According to the method disclosed by the invention, calculation cost can be obviously reduced, and a load of the CAN bus is reduced; and optimization is carried out for a key distribution protocol in the in-vehicle CAN bus, a key update problem generated when the external equipment is connected and released is considered, a counter is used for generating a random number to change a parameter for key generation, and a relay attack is effectively prevented.

Pure electric vehicle control unit calibration system based on CAN (controller area network) bus and calibration method

The invention discloses a pure electric vehicle control unit calibration system based on CAN (controller area network) bus, which comprises an upper computer with two-way communication and a lower computer with two-way communication. The upper computer comprises a data storage module, an MAP (macro assembly program) chart optimization module, a parameter calibration module and a CAN bus communication processing module. The lower computer is a pure electric vehicle control unit (VCU) and comprises a CAN bus communication module, a data acquisition module, a calibrated data storage module and a control algorithm module. The invention further provides a pure electric VCU online calibration method based on the CAN bus. By introducing the CAN bus into the design of the electric vehicle control unit calibration system, the invention realizes online optimization of the control parameters of power, response speed, electricity consumption and the like of the pure electric vehicle, sloves the problems of difficulty in modifying the parameters, long development cycle and poor maneuverability in the prior art, and solves the problem that differences of the operating conditions and diversity of the requirements on power performance and life mileage of the vehicles under different uses, requirements to the control parameters of the vehicle control units are different due to the type variety of pure electric vehicles.

Method and system for controlling remote preheating of electric automobile

The invention provides a method and system for controlling remote preheating of an electric automobile. The method for controlling remote preheating of the electric automobile comprises the steps of obtaining a vehicle use reservation instruction transmitted by a remote terminal; determining reserved vehicle use beginning time according to the vehicle use reservation instruction; obtaining a preheating time needed by heating a power battery to a first set temperature threshold; determining a preheating beginning time according to a vehicle use beginning time and the preheating time; if the preheating beginning time is larger than a set time threshold, enabling a vehicle-mounted TBOX to begin to time; when the preheating beginning time is reached, transmitting a dormancy awakening signal toawaken a vehicle controller by using a CAN bus and transmitting a preheating signal to the vehicle controller; and after the vehicle controller receives the preheating signal, transmitting a heatingsignal to a battery management module, wherein the battery management module controls a heating module to preheat the power battery. According to the method for controlling remote preheating of the electric automobile, the vehicle use comfort can be enhanced and the cruising ability of the electric automobile can be improved.
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