Vehicle CAN bus distributed control system Automotive CAN bus experimental teaching system

Vehicle Bus Distributed Control System Automobile Bus Experimental Teaching System
The microcontroller itself has a bit/D converter, so the analog signals output by the pedal position sensor and throttle position sensor are directly connected to the microcontroller for digital-to-analog processing. Mr. He, the developer of the automobile bus conversion experimental teaching system, said: There is no need to add a new /D conversion device. In order to filter out high-frequency noise, an R filter circuit is connected to the analog-to-digital input port and at the same time, the electronic throttle device actuator DC motor There is a port in the control that can drive the DC motor by connecting to the drive circuit. The driver of this device is used.
The entire bus control network consists of the foot pedal intelligent position sensor node, the throttle body position sensor and actuator node, and the controller node. The foot pedal intelligent position sensor node, throttle body position sensor and actuator node are composed of The main function of the microcontroller bus mechanism is to transmit the pedal position and feedback signal throttle position signal to the controller and at the same time receive the drive command signal sent by the controller to the actuator. The controller uses a microcomputer to realize bus communication and corresponding processing through Advantech-card. The control algorithm completes the control of the wire-controlled electronic throttle
Vehicle bus and distributed control system structure Automobile bus experimental teaching system
Control LAN () belongs to the industrial field bus and was developed by a German company in the early 1990s as a solution for modern automobiles A communication protocol developed for data exchange between numerous control and test instruments. The international standard for high-speed communication was officially promulgated in 2011. In the bus system, the collection of field data is completed by sensors. Currently, there are not many types of sensors with bus interfaces and their prices are low. Also more expensive.
There are a large number of sensors, electronic control units, actuators, etc. in the vehicle control system. Usually multiple controllers share the same sensor information and have high real-time and rapid requirements. How to connect them to form a distributed control network system? An important development direction of modern control systems is the fieldbus control system. The implementation of a typical control network structure belongs to the category of fieldbus. It is a multi-master serial bus that effectively supports distributed control or real-time control and is characterized by its short length. It is favored for field device interconnection due to its message frame and excellent bit-by-bit arbitration protocol.
The bus-based vehicle distributed control network system as shown in the figure adopts a fieldbus distributed system (D) structure, which is composed of sensors, actuators, controller intelligent nodes and field control networks. Multiple intelligent nodes independently complete data. Collection, system setting, operation control, etc. exchange various data and management control information between intelligent nodes through the field bus.
Principle and structure of wire-controlled electronic throttle system Automobile bus experimental teaching system
Electronic throttle control technology first appeared in the early 1990s and was initially only used in high-end cars. With the increasing development of electronic technology, energy issues and With the increasingly prominent environmental issues and the increasing requirements for vehicle performance, electronic throttles have become the most important control device on fully electronically controlled engines and have begun to be widely used in various vehicles. Its advantage is that it can be adjusted according to the driver's wishes, emissions, fuel consumption and safety. The demand is to quickly and accurately control the throttle valve at the optimal opening.
Intelligent sensor bus interface design automotive bus experimental teaching system
The design of intelligent sensor contacts is based on the company's microcontroller and independent bus controller and transceiver. The high performance of the r instruction system is the microprocessor's Harvard bus structure, low power consumption and high speed. It integrates D, serial peripheral interface and program memory with output and other functions. Seamless connection with the controller can be achieved through the interface. .