Abstract: The society has entered the era of information networks. People's demands for automobiles are no longer satisfied with a means of transportation. They also hope that automobiles are an extension of the scope of life and work. With the rapid development of computer technology, communication technology and integrated circuit technology, field instruments and devices represented by digital fieldbus are widely used. The cumbersome field connection is replaced by a simple fieldbus network, and the car has begun to enter. Internet Age.
Nowadays, society has entered the era of information networks. People's demands for cars are no longer satisfied with a means of transportation. They also hope that cars are an extension of life and work. They work like cars in their own offices and homes. life. At the same time, the rapid development of automotive electronics is considered to be a revolution in the development of automotive technology. The degree of automotive electronics is seen as an important indicator of the level of modern automobiles. With the rapid development of computer technology, communication technology and integrated circuit technology, the extensive application of field instruments and equipment represented by digital field bus has brought about tremendous changes in traditional field control technology and field control equipment. The cumbersome on-site connection was replaced by a simple and simple fieldbus network, and the signal transmission quality was greatly improved. The car also began to enter the network era.
According to the impact of the driving performance of the car, automotive electronics can be classified into two categories: one is the automotive electronic control device, including the engine, chassis, body electronic control. One type is automotive electronic devices, including automotive information systems, navigation systems, car audio and television entertainment systems, in-vehicle communication systems, and Internet access devices.
Applications in automotive electronic control devices Automotive is becoming more and more electronic, and related electronic devices are beginning to be used in large quantities, which will inevitably lead to longer and more complex vehicle wiring, while reducing operational reliability and increasing difficulty in troubleshooting. In particular, the introduction of a large number of electronic control units, in order to improve the utilization of signals, requires a large amount of data information to be shared among different electronic units. A large number of control signals in the integrated control system of the vehicle also need to be exchanged in real time, and the traditional lines are far from being able to Meet this need. In automotive electronic networks, digital serial communication is used between electronic devices, with multiple devices on a pair of buses. This networked design simplifies wiring, reduces the number of electrical nodes and the amount of wires used, which simplifies the assembly work, and also increases the reliability of information transmission, realizing the distribution of electronic devices in the vehicle. Information and resource sharing, through the data bus can access any electronic control device, read the fault code to diagnose it, and make the vehicle maintenance work easier.
At present, the development direction of electronic technology is focused on integrated control development: integrating engine management system and automatic transmission control system into integrated control (PCM) of power transmission system; braking anti-lock control system (ABS) and traction control system ( The TCS) is integrated with the anti-skid control system (ASR) for brake control; the control system for braking, suspension, steering, power transmission, etc. is connected via the bus through the central chassis controller. Through complex control calculations, the controller coordinates each subsystem to control the vehicle's driving performance to an optimal level to form an integrated chassis control system (UCC). Now the car has installed hundreds of sensors, dozens of microprocessors, and the number of CPUs used in some single cars on some high-end cars has reached dozens or even hundreds. On the basis of more comfortable cars, how to make cars more automated, intelligent and safe, makes the position of the network more prominent in the automotive electronic system. The communication line connects various kinds of automotive electronic devices into a network and sends them through the data bus. Receive information. In addition to independently performing their respective control functions, electronic devices can also provide data services for other control devices. After adopting the network technology, not only all the sensors are shared, but also other devices can be shared. For example, the ring network control is performed, and dozens of microcomputers are individual problems, and the whole vehicle can also operate normally. Therefore, the network not only adds a lot of functions in the automotive application, but also greatly increases the reliability. In order to meet the needs of automotive network control, it is better to exchange information, coordinate control, share resources, and standardize and generalize between control systems.
The introduction of automotive information systems, navigation systems, car audio and TV entertainment systems, in-vehicle communication systems, and Internet access devices in the automotive electronic devices have enabled the car to have the functions of mobile office, learning and training, safe driving and leisure entertainment. It is more comfortable and safe when driving a car. The vehicle electronic system has functions such as information processing, communication, navigation, language recognition, image display and entertainment. The top-notch artificial intelligence technology and network technology enable people to understand what it is to create fun for our driving life in the car. Now the industry companies are making unremitting efforts, such as Auto PC, which is installed on a dashboard called the ultra-luxury concept car, which is an open-structured car microcomputer platform. The car audio function, computer function, travel navigation function, voice recognition wireless communication system function is integrated, and the car technology is the core, providing information and entertainment facilities for the car, enabling the driver to receive e-mail freely during safe driving. Calling, dialing, inquiring about special destinations, receiving traffic and climate information, and re-electing music records. In addition, the company's car PC platform technology uses the Universal Serial Bus (ISB), which makes the platform compatible with all its USB products, providing endless opportunities for its hardware and software vendors. General Motors announced the development of a new "network" car with an Internet interface and voice recognition. Ford worked with Microsoft and Intel to develop an "ICES" automotive PC multimedia system with information processing, communication, entertainment and security, and theft prevention. Providing an Internet interface and adding emergency services, the system is able to "understand" and complete the driver's instructions to add new lines to existing electronic maps to maintain the usefulness of the map. In addition, the system uses speech recognition technology and remote emergency satellite communication technology, making car handling easier and more fun.
Inevitable Trends in the Development of Automotive Electronics Technology Due to the increasing power of automotive electronics technology and the increasing complexity of systems, an important trend in the development of automotive electronics is the extensive use of microprocessors to improve vehicle performance. With the increasing use of electronic control devices in automobiles, data communication between in-vehicle electronic devices is becoming more and more important. In order to further improve the economy and safety of driving, information such as temperature and speed must be exchanged between different control units. The rapid exchange, high reliability and practicality of large amounts of data are requirements for automotive electronic network systems.
Today, "car audio", "navigation system", "electronic information" are relatively independent systems, and tomorrow, but these areas are inseparable. Tomorrow's in-vehicle electronic entertainment system will be re-evaluated through navigation and electronic information functions. The ordinary components of the car are closely integrated with various audio-visual equipment, telephones, satellites, global positioning systems and other devices through the car computer. In the near future, the combination of car navigation, network functions and audio will become the basic equipment for every car. As part of the integrated components, car navigation and electronic information will be the basis for free flow.
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