8814 results about "CAN bus" patented technology

A rental / car-share (RCS) vehicle access and management system and method, in some embodiments, utilizes barcodes, QR codes (or NFC / RFID), GPS, and a mobile app coupled with a wireless network to enable customers to bypass the reservation desk and pickup and drop off reserved RCS vehicles using a mobile phone, tablet or laptop. The QR code, RFID, or NFC communication with the mobile application allows for identification of the vehicle by a mobile application, which, if authorized, can access the vehicle via a temporary access code issued by remote servers. The remote servers and / or mobile application communicates with a control module that plugs into the on-board diagnostics module of the rental / car-share (RCS) vehicle and includes a host processing unit with a processor, an accelerometer, data storage, a GPS with internal GPS antenna; a wireless modem with internal antenna, and CAN bus transceivers connected with the processor, and a USB programmable interface.

The invention discloses a battery managing system (BMS) testing platform comprising a testing platform main control computer, a high-precision cell voltage simulator, a high-precision large-current constant-current source, a high-precision thermotank, a battery managing system to be tested, a whole vehicle controller simulator and the like which are connected by CAN buses. The battery managing system is connected with a cell box air cooling device, a vehicle relay assembly and the like. The battery managing system testing platform can truly simulate the output state of a battery, comprising single cell voltage, total voltage, charging and discharging current, temperature and the like of the battery, can complete various communication and command functions, protection functions, battery heavy current applying process between the battery managing system and the whole vehicle, and the test and the verification on the functions of overhead protection and the like of the battery. The invention can carry out testing evaluation on the data collection precision of the battery managing system, the evaluation precision of the charge state of the battery and the like.

The present invention relates to a track control system for hydraulic excavator working equipment and its method. Said system includes the following main components: DSP, moving arm angle detection mechanism, bucket arm angle detection mechanism, bucket angle detection mechanism, hydraulic cylinder, engine, working equipment and its driving cylinder and CAN bus. Said invention also provides the concrete steps of said control method. It can implement automatic control of hydraulic excavator working equipment, and can accurately and stably control the position and attitute of said hydraulic excavator working equipment so as to raise its working efficiency.

A device and system that can dynamically provide variable load on a generator and intelligently distribute generated power to loads and energy storage devices is disclosed. One system includes load profile controllers that employ a switching strategy to dynamically vary the load the generator induces while producing regenerative energy. This switching strategy may allow for a wide dynamic range of configurable damping characteristics, as well as decouple generator damping and the system output power. Multiple load profile controllers can be used together via a communications network, such as a vehicle controller area network (CAN) bus. A central regeneration controller or existing electronic control unit (ECU) can issue commands to change damping performance in different load profile controllers. By networking multiple load profile controllers together in either a distributed or centralized manner, the system may allow for intelligent power routing, coordination of multiple energy-generating devices (such as regenerative shocks and brakes), and improved utilization of on-board energy storage devices.

Structures and methods herein insert one or more parallel “recessive nulling” driver impedances across a controller area network (CAN) bus starting at the time of a dominant-to-recessive data bit transition and extending for a selected recessive nulling time period. Doing so increases a rate of decay of a CAN bus dominant-to-recessive differential signal waveform, permits a shortened recessive bit time period, and allows for increased CAN bus bandwidth. Various modes of operation are applicable to various CAN bus node topologies. Recessive nulling may be applied to only the beginning portion of a recessive bit following a dominant bit (“LRN mode”) or to the entire recessive bit time (“HRN mode”). And, some embodiments may apply LRN operations to some recessive CAN frame bits and HRN operations to others.

Disclosed herein is a modular battery system having at least one subsystem comprising a plurality of battery modules connected in series or parallel, wherein each subsystem preferably having a first endplate and a second endplate. The battery modules may be bound between the first and second endplates. A plurality of band members couple the first and second endplates to each other and bind the battery module between the endplates. Further, a data collection panel is in electrical communication with each of the battery modules and the data collection panel transmits status information of the modules to a master control module, which converts the electrical into a data transmission through a controller area network (CAN) bus. Status information may include module temperature, module pressure and module voltage, essentially any measurable parameter that may be conducted via an electrical signal. Depending on the needs of a given application, the battery modules may be connected in series or parallel.

The invention provides a vehicle formation driving control system and method, and belongs to the field of vehicle driving control. The vehicle formation driving control system comprises a head vehicle and at least one rear vehicle. The head vehicle and the rear vehicles are provided with fleet queue control terminals and whole-vehicle controllers. The whole-vehicle controllers control the driving states of the vehicles. The fleet queue control terminals are connected with the whole-vehicle controllers through CAN buses. Each fleet queue control terminal comprises a wireless communication module used for mutual communication among the head vehicle and the rear vehicles; a distance detecting module used for detecting the distance between the vehicle and a front vehicle; a positioning module used for obtaining the real-time information position of itself; and a lane information obtaining module used for obtaining lane information. The vehicle formation driving control system and method maintain the stability of a fleet, enhance the driving safety and help fleet members successfully and rapidly reach destinations respectively; in addition, the system and method are simple and effective, the scheme is mature, the oil consumption can be reduced by as much as 50%, and the frequency of traffic accidents is effectively lowered.

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.

An anomaly detector for a Controller Area Network (CAN) bus performs state space classification on a per-message basis of messages on the CAN bus to label messages as normal or anomalous, and performs temporal pattern analysis as a function of time to label unexpected temporal patterns as anomalous. The anomaly detector issues an alert if an alert criterion is met that is based on the outputs of the state space classification and the temporal pattern analysis. The temporal pattern analysis may compare statistics of messages having analyzed arbitration IDs with statistics for messages having those analyzed arbitration IDs in a training dataset of CAN bus messages, and a temporal pattern is anomalous if there is a statistically significant deviation from the training dataset. The anomaly detector may be implemented on a vehicle Electronic Control Unit (ECU) communicating via a vehicle CAN bus. The anomaly detector does not rely on an database of messages and their periodicity from manufacturers (dbc files) and in that sense is truly a zero knowledge detector.

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.

A battery management system based on a real time operation system which belongs to the technical field of vehicle storage battery management includes a CPU, a load voltage collecting module, a total voltage collecting module, a module voltage collecting module, a current collecting module, a temperature collecting module, a time collecting module, a CAN bus communicating module and a contactor control module. The CPU is respectively connected with a voltage collecting module, the current collecting module, the temperature collecting module, the time collecting module, the CAN bus communicating module and the contactor control module. The battery management system based on a real time operation system transplants a uc / OS-II multi-task real time operation system into the CPU, thus simplifying the software programming of a vehicle storage battery management system under the dispatching of the real time operation system, improving the execution efficiency to manage the system software, ensuring the real time property of data collection and enhancing the working stability of the system.

The invention provides an auto air-conditioner control system and a control method thereof, and aims to satisfy the requirements of security and comfort. The system comprises an air-conditioner control unit. The air-conditioner control unit receives signals from an internal temperature sensor, a sunlight sensor, an external temperature sensor, an air quality sensor and an evaporator temperature sensor and sends control commands to control the work of an electric velocity modulation module, a blower, an internal and external throttle actuator, a mixture throttle actuator, a pattern throttle actuator and a defrosting throttle actuator, especially the air-conditioner control unit is connected with a front body electronic control system and an engine electronic injection control system through a CAN bus; and the air-conditioner control unit adjusts the work of the air condition system through the state information of the front body electronic control system and the engine electronic injection control system. The system optimizes circuit design, simplifies the operation procedure, satisfies the comfort requirement of a driver, and improves maintenance convenience and the reliability and safety of the system.

The invention relates to an automatic vehicle-mounted electronic control unit CAN bus communication testing device. A testing host of the device controls a programmable power supply to output different amplitudes of voltages according to working requirements of an ECU; physical layer testing signals of a CAN bus are output to a network oscilloscope to be displayed, and physical layer testing data are transmitted to the testing host through the network oscilloscope; ECU testing data are transmitted to the testing host through a bus data acquisition device; the testing host records, analyzes and evaluates the testing data of the ECU and the CAN bus to generate a test report. A bus interferometer is used for interfering with bus waveforms of the tested ECU in real time. The testing host controls on-off states of relays of a bus testing board card through a testing control card board to execute the bus fault injection operation. By means of the automatic vehicle-mounted electronic control unit CAN bus communication testing device, various defects of a manual test are overcome, unnecessary repeated labor of a vehicle-mounted network engineer is reduced, and the testing result is accurate.

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.

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.

Disclosed is a system providing tracking and wireless communications for remote diagnostics of a vehicle which transmits data communicated over a vehicle system's CAN bus to a remote location, which is adapted to use data received from a vehicle in order to compare the performance of the vehicle and / or of the operator of the vehicle with the performance of other vehicles and / or operators of other vehicles, which incorporates advanced power management functionality for conserving power, particularly when the system is disconnected from a main power supply, and which facilitates the identification of vehicles that have not reported back to the system or that have not moved within a specified time period.

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.

The invention provides a vehicle fault remote diagnosis system, which includes a remote diagnosis ECU and a remote diagnosis server. The remote diagnosis ECU is connected with a CAN bus of a vehicle. The remote ECU collects fault information stored in ECUs on the vehicle and collects real-time dynamic information of the vehicle according to the needs of a user. Meanwhile, the remote diagnosis ECU executes the real-time information interaction between the vehicle and the remote diagnosis server. The ECUs on the vehicle refer to all the other ECUs on the vehicle except the remote diagnosis ECU. The remote diagnosis server stores an ECU diagnosis database, the vehicle model and the vehicle VIN code information, sends the collected diagnosis request of the user to the remote diagnosis ECU, and converts fault data returned by the remote diagnosis ECU into a diagnosis result which is sent to the user. According to the invention, a faulty vehicle can be remotely diagnosed in real time, the influence of the remote diagnosis on the normal running of the vehicle is eliminated, and the vehicle driving safety is ensured.

An apparatus and operational method are disclosed that use control hardware resident in a vehicle to enable a remote computing system to wirelessly communicate with the vehicle. The control hardware includes a processor configured to interface with a wireless network and the vehicle through, respectively, a wireless network interface and a vehicle interface. A plurality of CAN (control area network) bus transceivers may exist within the vehicle interface operable to allow the processor to interface with multiple vehicle types. The processor may then be configured to automatically detect an identifier for the vehicle though the vehicle interface and automatically select a CAN bus transceiver from the plurality of CAN bus transceivers based on the detected identifier. The processor can then communicate with the vehicle's CAN bus via the selected CAN bus transceiver.

The invention discloses a CAN bus-based pure electric vehicle charging method and a CAN bus-based pure electric vehicle charging system. The charging system comprises a complete vehicle controller, a battery management controller, a power battery pack, a 12V storage battery, a charger and a DC converter. The controllers perform information interaction through the CAN bus; the complete vehicle controller manages and controls the complete vehicle system state; a battery management system acquires the information of the power battery and the 12V storage battery and transmits the battery information to the complete vehicle controller; the charger charges the power battery during work; and the power battery charges the 12V storage battery through DC / DC and provides a power supply for complete vehicle 12V electric equipment. The CAN bus-based pure electric vehicle charging method and the CAN bus-based pure electric vehicle charging system have the advantages of monitoring the complete vehicle system state, providing a working power supply for charging process-related controllers through the storage battery, flexibly controlling the charging of the storage battery through the DC converter and guaranteeing the complete vehicle safety in the charging process.

A Controller Area Network (CAN) node consists of a high-powered microcontroller, a low standby power regulator, a CAN bus transceiver, and a minimal CAN message buffer for storing received messages. Low power standby operation allows for the controller to power off, while the transceiver and regulator are operated in standby. The transceiver / regulator will enter run mode after the first symbol of a received CAN message is validated off the bus. As the original CAN message is received, it is buffered in the message buffer and, after stored, a status register is set to indicate the full message has been received. Once the controller has stabilized out of a wake-up mode, it retrieves the stored message and acts accordingly. The CAN message buffer is coupled to the controller by an system packet interface (SPI) interface for transmission of a controller wake-up command and retrieval of a buffered message.

The invention provides a modular lithium power battery and its management system and management method, which collect important cell voltage and current parameters in two independent ways; the charge and discharge protection switch control module adopts two independent paths for transmission , thereby greatly improving system reliability by providing redundancy. In addition, by simultaneously using the parameter threshold and parameter gradient (rate of change per unit time) as the basis for judging the control state, it has certain fault predictability; it has certain fault tolerance by analyzing the obtained parameters according to the correlation between different parameters; CAN bus communication Use relays and algorithms for dynamically setting communication priorities to ensure that fault status is quickly transmitted to the system master. The connection expansion mode of the modular lithium power battery includes the electrical connection and communication connection between the systems.

A system used for detecting operation parameter of centralized / distributed storage battery set on motor-driven vehicle is prepared as forming said system by using CAN bus to connect a numbers of detection module with each other, modularizing and localizing detection unit as well as using bus to transmit data to from a centralized / distributed detection mode. The detecting method utilizing said system is also disclosed.

The invention is a power output switching method and control system of power assembly of mixed power saloon car. It can switch the power output and manage system energy, and according to state switching boundary value and result judgment of data collection, makes the power assembly switch to the states such as reclaiming plugging energy; charging accumulator by engine; electric driving; mixed driving; engine driving; etc to make coordination treatment. Its control system includes main chip, as well as switch quantity conditioning circuit, analogue quantity conditioning circuit, pulse signal conditioning circuit, CAN bus interface, D / A converting circuit, drive isolating circuit, etc, where they are all connected with the main chip. It can make the output torque realize fast smooth switch in a large range, and heightens the energy using efficiency.

The invention relates to a battery management system which comprises a main controller (1) connected with an internal CAN bus (2) and more than one slave controller (3), wherein each slave controller is connected with a corresponding battery module (5) and a corresponding battery equalizer (4) pairwise; the main controller is also connected with an external CAN bus (6), and both the internal CAN bus and the external CAN bus comprise respective independent CAN communication modules. Furthermore, in the battery management system, the slave controllers and the battery equalizers are provided with independent interfaces connected with the battery modules, an independent AD sampling chip in each slave controller adopts an isolated DC-DC power supply, the communication between the independent AD sampling chips and a microprocessor is isolated by an optical coupler, the main controller monitors the current of a battery pack by using a double-range Hall current sensor. Thus, the structure of the management system is safe and reliable, interference among the AD sampling chip, the microprocessor and the battery equalizer is avoided, and the test requirement of current measurement under two different conditions is met.

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.

The invention relates to an automobile tyre burst safe control method and a system thereof. The method comprises the steps as follows: 1) an automobile tyre burst safe control system is established and comprises a signal collecting unit, a main control unit, a lengthways safe executing unit and a transverse safe executing unit, and all units are communicated with each other by a vehicle CAN bus; 2) when an automobile tyre bursts, the main control unit sends a control instruction to the lengthways safe executing unit and the transverse safe executing unit; 3) after receiving the control instruction, the lengthways safe executing unit closes a throttle valve by a throttle valve automatic control apparatus and drives a lengthways braking executing device to lead the automobile to reduce the speed fast; and 4) simultaneously, after receiving the control instruction, the transverse safe executing unit controls a steering auxiliary motor to lead the automobile to keep the former running direction. The invention has less difficulty to be realized, high reliability and low cost and has important practical significance and wide application prospect.