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From the 1980s to the present day: How does the CAN bus change the future of automotive communications?
In the rapid development of automotive technology, Controller Area Network (CAN) is undoubtedly one of the most revolutionary technologies. Since its development by Bosch in the 1980s, CAN bus has become increasingly widely used in automotive communications. Its original intention is to simplify cable layout, reduce manufacturing costs, and improve the reliability of data transmission. However, with the emergence of emerging technologies such as electric vehicles and connected vehicles, the role and significance of the CAN bus are also constantly evolving.
History of CAN bus
Development of the Controller Area Network began in 1983 and was officially launched in 1986 at the Society of Social Engineers (SAE) conference in Detroit. In 1991, the Mercedes-Benz W140 became the first mass-produced car equipped with the CAN bus system, marking its successful application in the automotive field. Since then, with the advancement of technology, CAN has launched multiple versions, including the now popular CAN 2.0, CAN FD and CAN XL.
The structure and operation of CAN bus
CAN is a multi-host serial bus standard that connects numerous electronic control units (ECUs) to ensure efficient communication between these units. Each node is connected by two twisted absolute wires to ensure that signal interference and transmission delays are minimized. This architecture not only supports real-time communications but also manages the priority transmission of data through a so-called "arbitration" process. This means that even when multiple devices send data at the same time, the CAN bus can ensure timely and accurate transmission of data.
The CAN bus has quickly become the core of automotive electrical systems due to its strong anti-interference ability and reliability.
Different versions of CAN standards
Different versions of the CAN standard differ in data transmission rates and data loads. CAN 2.0 is the most commonly used standard and supports a maximum data payload of eight bytes. As demand increased, CAN FD came out in 2012, capable of supporting larger loads up to 64 bytes, and improving the efficiency of data transfer by changing the transmission rate.
The emergence of CAN FD has greatly enhanced the flexibility and capabilities of automobiles in data communication, making more advanced control systems possible.
Application and impact in the automotive industry
Today's cars may have as many as 70 electronic control units, each responsible for important functions such as engine control, autonomous driving and advanced driver assistance systems (ADAS). The CAN bus allows efficient communication between these ECUs, which not only improves safety but also significantly improves the driving experience. For example, an automatic start-stop system receives data from various sensors via the CAN bus to determine when to stop the engine to improve fuel efficiency.
Prospects for future automotive communications
With the continuous advancement of electric vehicles and autonomous driving technology, the CAN bus will surely face higher requirements and challenges. Facing industry competition, especially in terms of real-time performance and data processing capabilities, the future of CAN may lead to the development of more efficient communication standards, such as CAN XL, which opens up the possibility of larger data loads and faster transmission speeds. sex.
CAN XL not only inherits the old advantages, but also complements the flexibility and scalability required by new technologies.
Other application areas
In addition to automobiles, the CAN bus excels in many other areas, such as industrial automation, medical instrumentation, and even in applications such as deep-sea diving computer integration. The reliability and flexibility provided by this technology allow it to operate stably in environments facing interference.
Conclusion
All in all, from the technological innovation in the 1980s to today's ever-changing automotive market, the CAN bus has become an indispensable part and has a profound impact on the development of future automotive communications. With the advancement of technology, what new changes and challenges will the CAN bus face?
