Application and development of CAN bus technology in automobiles Chengdu Panfeng Technology

Application and development of bus technology in automobiles Chengdu Panfeng Technology As the number of data communications between electronic control units increases, it becomes important to obtain high-speed data transmission rates. The original design target was approximately data rates, however, the protocol allowed higher rates to be achieved.
It is a scalable communication system that supports synchronous or asynchronous data transmission. Synchronous data transfer enables time-triggered communication to meet system reliability requirements. Asynchronous data transfer based on protocol fundamentals allows each node to utilize the full bandwidth in event-driven communication.
's synchronous data transmission is deterministic and ensures minimal message transmission delay and message jitter. Compared with the optimization method, this performance is superior. The arbitration method can delay the sending of low-priority messages and allow high-priority messages to be sent first. Therefore, except for the highest-priority messages, the delay of any other messages cannot be determined in advance. It is guaranteed that the transmission time is preset for each message in the synchronous transmission part without affecting other messages.
Supports redundant and fault-tolerant distributed clock synchronization based on global standard time, thereby ensuring that all network nodes can work in an orderly manner within a compact, preset precise time window. In the synchronous communication section, each electronic control unit is assigned a fixed time slot number, which ensures that each message gets the required bandwidth and time slot. This allocation ensures that all messages can be transmitted without competing for bandwidth or going through arbitration.
An independent bus monitoring circuit is used to detect physical layer errors to ensure that no data transmission conflicts occur in the event of a communication controller failure. In electronic control applications, it is very important that all application information in the distributed system is connected through communication protocols so that the application functions can be executed within a known time range.
The communication system supports both fiber optic and electrical physical layers, allowing users to adopt whichever cabling scheme best suits their needs. Fiber optic data transmission has the advantage of being immune to electromagnetic interference, which can have a highly damaging effect on communications over electrical lines.
Regrettably, there is still no communication network that can meet all the cost and performance requirements of future cars. As a result, automakers will continue to use multiple networking protocols (including AV, AV, and AV). The cars of the future will be networked.