18 results about "CAN bus" patented technology

The invention relates to a low-voltage electrical appliance communication protocol adapter which comprises double single chips, double Modbus-RTU protocol converting circuits, a Profibus-DP, a DeviceNet protocol converting circuit, an off chip data memory, an LCD (liquid crystal display) screen and a keyboard, wherein on chip universal asynchronous receiver-transmitters of the double single chips are respectively connected with the Modbus-RTU and an RS485 level converting transceiver circuit; an on chip control local area network is respectively connected with double DeviceNet converting transceiver circuits to finish acquiring low-voltage electrical appliance data and responding to bus commands and events; meanwhile, I2C communication modules of the single chips are connected with the off chip data memory based on I2C to finish storing the data and extracting processed low-voltage electrical appliance parameters. Due to the adoption of double processor operations and a caching technology, technical schemes such as response time, and the like when other adapters are operated are reduced so as to ensure that the low-voltage electrical appliance communication protocol adapter becomes a centralized controller, a small network server and an adapter. The adapter can hang at most three buses, thereby increasing the adaptability of low-voltage electrical appliances during networking and facilitating users mounting.

The invention discloses a multi-state switch state collection device and method, and belongs to the technical field of multi-state switch state collection technologies. The invention solves the problems that in the prior art the states of the multi-state switch only can be obtained by changing a hardware circuit. The multi-state switch state collection device and method disclosed by the invention abandon the inherent thinking that the states of the multi-state switch only can be obtained by changing the hardware circuit during current state identification, but directly judge a multi-state switching value signal through the cooperation of the fixed circuit and hardware to obtain the states of the multi-state switch. When in actual application, the method provided by the invention can be implemented by software, in the prior art the hardware can perform online change by a CAN bus, so that the workload is reduced, and the process is simplified. Compared with changing the circuit, it is more convenient to modify the software program, and the accuracy during the collection process can be better ensured. The multi-state switch state collection device and method are applicable to diagnosing open circuit or short circuit, and also applicable to the various fields needing to collecting switch states.

The invention relates to a fuel cell power system monitoring technology. The invention particularly relates to a fuel cell power system platform upper computer monitoring method based on a CAN bus. Anupper computer is connected to a fuel cell controller, a DC/DC and a CAN network of an adjustable load through a CAN bus. A parallel processing multi-thread structure is adopted to receive messagesof the DC/DC, the adjustable load and the fuel cell controller, and display real-time data and curves and stores data of parameters and states of the DC/DC, the adjustable load and a fuel cell engine.The messages are sent to the fuel cell controller and the adjustable load by operating function buttons on an interface of the upper computer and setting control target values of related components,and then manual control, automatic control and forced manual control are conducted on the fuel cell power system platform. According to the method, state monitoring and energy control strategy debugging of the fuel cell power system platform are facilitated, the anti-interference capability is high, and the control performance is stable.

The invention discloses a non-contact curve automatic auxiliary lighting system, and belongs to the field of automobile auxiliary devices. The non-contact curve automatic auxiliary lighting system aims at adding an auxiliary highlight LED lighting lamp system so as to achieve the aim that a swerving dead zone can also be lighted. Highlight LED lamps of the non-contact curve automatic auxiliary lighting system are installed at the positions of rearview mirrors of an automobile in a slant mode. A steering wheel turned-angle measuring module is installed on a steering wheel. An MCU control module receives the steering wheel turned-angle information on an automobile CAN bus through a CAN bus communication module. The non-contact curve automatic auxiliary lighting system can be installed on all the automobile types in the market, can effectively assist lighting in automobile night curve running, is simple in installation and safe and reliable in performance, reinforces the safety guarantee of night curve running, and is obvious in economical benefit and social benefit. The non-contact curve automatic auxiliary lighting system can carry out lighting on the light dead zone in automobile night curve running, is safe and reliable in performance, reinforces the night running safety and is obvious in economical benefit and social benefit. The lighting can further achieve day running lamp lighting in the daytime.

The invention discloses a finished car control model simulation method which can be used for reducing the establishment time of a simulation environment, improving the efficiency and simulating input signals including digital quantity, simulation quantity, a PMW signal and a CAN (controller area network) bus signal. The method comprises the following steps of (1) inputting the analog quantity, the digital quantity and the PWM input signal needed by a finished car control model through a signal builder, a MAT file or an Excel file of the Matlab (matrix laboratory); (2) storing and observing the analog quantity, the digital quantity and the PWM signal in a feedback signal through a scope, display or a MAT file; (3) exchanging an input/output signal of the CAN bus of the finished car control model with the Matlab via CANoe through a vector CANoe tool box.

The invention provides a main engine and auxiliary engine interaction method, a Bluetooth gateway, an auxiliary engine mobile device and a vehicle-mounted terminal. The main engine and auxiliary engine interaction method comprises the following steps that: the Bluetooth gateway receives query command information transmitted by the auxiliary engine mobile device accessed in the vehicle-mounted terminal in advance; the Bluetooth gateway transmits the query command information to the vehicle-mounted terminal through a CAN bus to enable the vehicle-mounted terminal to transmit the external information of a vehicle and/or the internal state information of the vehicle to the Bluetooth gateway through the CAN bus according to the query command information; and the Bluetooth gateway converts the external information of the vehicle and/or the internal state information of the vehicle into Bluetooth information and then transmits the Bluetooth information to the auxiliary engine mobile device. According to the main engine and auxiliary engine interaction method, the Bluetooth gateway, the auxiliary engine mobile device and the vehicle-mounted terminal, provided by the invention, a driver and passengers in the vehicle can effectively enjoy the information shown in a dashboard and a central display screen, recreational experience is provided, and the comfort of the driver and passengers in the vehicle can be improved.

The invention discloses an automatic recognition method for the Baud rate of a CAN bus of a digital oscilloscope, and the method comprises the following steps: 1, judging whether there is a signal inputted into an oscilloscope channel or not; 2, setting a Baud rate variable, and assigning a common minimum Baud rate to the Baud rate variable; 3, locating a second data frame or a remote control frame of a CAN bus signal; 4, decoding CRC segments of the data frame or the remote control frame; 5, comparing a CRC sequence of the CRC segments obtained through decoding with a CRC value calculated through a CRC algorithm of a CAN bus protocol: determining that the recognition of the Baud rate is successful and switching to step 7 if the decoded CRC sequence is equal to the calculated CRC value, orelse assigning a next common Baud rate value to the Baud rate variable from the small to the big; 6, repeatedly carrying out the steps 3-5, traversing all common Baud rates, and switching to step 8 if the recognition of the Baud rate fails; 7, displaying the recognized Baud rate value after the successful recognition; 8, finishing the operation. The method can achieve the automatic recognition and analysis of the CAN bus signal and obtains a correct Baud rate.

The invention discloses a wind driven generator capable of being started immediately and relates to wind driven generators. The wind driven generator is provided with a motor, a motor control module, a generator body, a load output control module, a wind turbine and a sensor module. The motor control module is connected with the motor, the generator body is connected with the motor through a transmission mechanism, the input end of the load output control module is connected with the generator body, and the output end of the load output control module is connected with a load. The wind turbine is connected with the generator body through a transmission mechanism, the sensor module is connected with the motor control module and the load output control module through a CAN bus, and the sensor module is connected with the generator body. The wind driven generator has the features of rapidly-started wind driven generators, the starting time is shortened, soft starting is conducted on the motor, and the service life of the motor is prolonged; power monitoring is conducted on the generator body, the maximum power point can be effectively and automatically tracked, and the service life of the generator body can be prolonged; the CAN bus is used for communication, the communication distances between all the modules are effectively enlarged, and the application field is effectively widened.

The invention discloses a vehicle speed monitoring method, system and device, and a storage medium. The method comprises the following steps: acquiring license plate information of a vehicle, and uploading the license plate information to an upper computer system; determining an identity code of the vehicle according to the license plate information; and inquiring vehicle speed data of the vehicle in a CAN bus according to the identity code. The vehicle speed data is obtained through the following steps that bus data of a vehicle are collected through a data acquisition terminal; the data acquisition terminal is arranged on the vehicle; and the bus data and the identity code of the vehicle are forwarded to a CAN bus through the data acquisition terminal, and the bus data is analyzed through the CAN bus to obtain vehicle speed data of the vehicle. According to the vehicle speed monitoring method, the vehicle speed monitoring precision of the vehicle can be effectively improved, the vehicle speed monitoring accuracy is improved, and the human cost of vehicle monitoring can be reduced. The method, the system and the device can be widely applied to the technical field of vehicle monitoring.

The invention discloses a black box fire monitoring and alarming system for a ship. The black box fire monitoring and alarming system for the ship comprises multiple fire monitoring and alarming devices which are arranged on the ship, a black box and a fire monitoring and controlling computer, wherein the black box and the fire monitoring and controlling computer are arranged in a wheelhouse, each fire monitoring and alarming device comprises a fire monitoring controller module, a first CAN bus communication circuit module, a Flash memorizer module, a smoke detector, a heat detector and a manually-operated call button, a main control board, a power supply, a data storage unit and a communication unit are integrated in the black box, a central processing unit, a chipset, a CAN bus interface circuit module, an RJ45 interface circuit module and an internal storage are arranged on the main control board, and the communication unit comprises a second CAN bus communication circuit module, a short message gateway and a network interface card. The black box fire monitoring and alarming system for the ship is simple in structure, reasonable in design and high in degree of intelligentization, real-time detection is achieved, real-time transmission is achieved, rapid alarming is achieved, the occurrence rate of fire is decreased, the life safety of people is guaranteed, the use effect is good, and the system can be popularized and used easily.

The invention provides a CAN (Controller Area Network) bus communication control system and a communication system, the communication system is based on an SoC (System on Chip) framework consisting ofan MCU (Microprogrammed Control Unit) kernel and an FPGA (Field Programmable Gate Array) kernel which are integrated in the same system on chip, and a CAN bus controller module, an MCU bus mapping module and a CAN bus interrupt signal mapping module are arranged on the basis of logic resources in the FPGA kernel; the CAN bus between the MCU and the off-chip external CAN equipment is integrated inthe chip, the number of the CAN buses can be dynamically configured, and priority classification control of the MCU kernel on each CAN bus controller module is realized, so that the expansibility andusability of the MCU are improved, the design and application complexity of mounting the external CAN equipment by the MCU is reduced, a user can quickly apply the CAN buses, the dependence of the CAN bus priority on the CAN equipment node is reduced, and the controllability of the MCU on the CAN equipment node priority is enhanced. The invention also provides a method for dynamically configuringthe priority of each equipment node of the CAN bus.

The invention relates to a system for measuring millisecond return response time of a CAN bus product, and belongs to the field of industrial control design. The system comprises a to-be-tested product, a calculation conversion module, a test module, a first timing module, a second timing module, a return analysis module and a response time calculation module. The method is specially used for solving the problem of CAN bus products, and is applied to measure the situation that various tested devices give a return response in millisecond time. The reaction time of the tested equipment is obtained by judging the time difference between the first moment and the second moment, and the unit is 0.1 millisecond; the method provided by the invention is relatively accurate, and meets the requirement of applying the CAN bus product to test and measure the return response time of the tested equipment of which the millisecond level is less than or equal to millisecond level.

The invention discloses a detector and a main controller, the detector is installed under the seat of the passenger car and in the battery compartment, powered by a vehicle-mounted DC 24V, the detector is connected to the main controller through wireless, and the abnormal gas and ambient temperature are detected in real time. Monitoring, the main controller is powered by DC 24V, and connected to the car instrument through the CAN bus. The detector detects the hazardous gas and ambient temperature, and sends the detected data to the main controller wirelessly. When the transmitted abnormal gas concentration or ambient temperature exceeds the set threshold, the main controller will turn on the corresponding sound and light alarm, and transmit the data to the car dashboard, prompting the driver to take measures to pull over and open the car door. The invention adopts the zigbee wireless connection, which is convenient for installation, and the single point damage will automatically re-establish the network to restore the communication, and the reliability is high. The sensor can detect various anomalies such as volatile gas, temperature, and carbon dioxide of flammable products, and can be easily installed in key points such as carriages and battery compartments to detect and warn of various dangers.