Design And Implementation Of Node Control Unit Based On In-Vehicle Bus

The rapid development of automotive industry, not only benefit from thedevelopment of electronic technology, and the corresponding vehicle networktechnology development, in technology development technology, by science andtechnology and promote the development of automobile impact, is more like a ragingfire, in order to keep up with the vehicle development pace of modernization, manyautomobile manufacturers have put forward a kind of new concept, namely networkcar, now the car has been far higher than its original meaning, is not simple sense ofthe vehicle, but the collection of information, entertainment, comfort, security,communications, an integrated office network equipment, along with the car thedevelopment of network technology, more and more electronic equipment can beapplied to vehicles, although these devices references give car has broughtconvenience, but at the same time, how to make these devices and efficient work whilenot affecting the car itself, become the problems to be solved.Now the car has been far higher than its original meaning, the absolute sense isnot merely a means of transport, but a set of information, entertainment, comfort,security, communications, office equipment, integrated network, with the cardevelopment of network technology, more and more electronic equipment is applied tothe car, although references to these devices bring convenience to the car, but how tomake these devices work efficiently without affecting the car itself, should becomesolve the problem.Car CAN and LIN bus to deliver the goods, not only solve the body weight andcumbersome wiring harness link problems, but also for vehicle information reliabletransmission to provide a guarantee, the CAN bus are generally used in automotiveparts, engine management system, ABS, airbag system and so on, all these require busreal-time transmission the higher, better stability, and the CAN bus is able to meet thisrequirement, at the same time, to the windows, locks, lighting, ceiling, seat and so needcorresponding control, LIN bus for these low speed equipment, while LIN busdevelopment of convenient and suitable for large-scale promotion, so the car lot and the application of the two vehicle bus, are used without purposes. The two busrepresenting the different transmission rates, but on the whole transmission qualityhigh, due to the body ’s electrical equipment complex, and the number of the majority,it needs a more unified network equipment uniform protocol to connect managementcar on a variety of electrical equipment, it is foreseeable, the cars of the futuredevelopment in, vehicle network technology is a hot research topic, the development inthe future will be better and better.Automotive network technology is accompanied by the development of industrialfield bus development, the original development of the field bus is due to the needs ofindustrial control and automotive electronics products. Field bus is a bit stronganti-jamming transmission of real-time, this field bus technology is a reference to thevehicle network technology which is development from the CAN bus, LIN bus. CANbus is a design by Dr. companies, it requires the birth of the two bus systemsapplications in different parts of the car. The CAN bus can be divided into power CANbus and anti-lock braking system bus. The LIN bus receive the rate limit is generallysuitable for low-speed CAN bus connected devices, due to the higher stability of theLin bus transfer, and Lin bus equipment is relatively cheaper and easier to promote.Lin bus was introduced in the automotive network technology. Automotive technologycontinues to evolve, the executive body on the car is increasing, between a variety ofequipment on board to continue to use old-fashioned point-to-point connection. Therewill be a lot of problems, such as a high degree of complexity, increased costs, spaceconsumption and the body itself weight will increase dramatically. The integratedinput and output of each device is limited, forcing the vehicle network technology usesa bus architecture, bus architecture has many advantages, such as reducing thecomplexity of system distribution and wiring is relatively easy, cost and body theweight of a significant decline at the same time improve the reliability.The paper is arranged as follows: the first chapter introduces the developmentprocess of vehicle bus and bus to car development function, the second chapterintroduces the vehicle CAN bus and LIN bus protocol, the third chapter in this papermade the detailed design, including software and hardware development platform tobuild, and CAN and LIN node node the overall design, the fourth chapter in the nodebackstage function made the whole design, including query, human-computerinteraction, and center database. The fifth chapter through the experiment result is given and suggestions, the sixth chapter summarizes the whole thesis and puts forwardthe prospect of.