Passive and active safety systems are beginning to merge with other electronic systems in cars, and cars are becoming more autonomous and smarter. With the application of advanced driver assistance systems such as radar and visual inspection, electronic systems that respond much faster than drivers will be able to take over control, reduce the frequency and severity of accidents, and greatly enhance the driving experience.
In recent years, automotive-related topics have always occupied a large area in the global media. On the one hand, in the current economic downturn, the global auto market is facing constant shocks; on the other hand, the world places too many expectations on new energy vehicles, and the topic of new energy vehicles can always attract wide attention. For China, a big country in automobile production and manufacturing, there is also a social topic brought about by the rapid growth of the automobile-the economic dividend brought by the rapid growth of the automobile industry, and the resulting urban congestion, environmental pollution and traffic safety, etc. .
The application of new technologies in automobiles is becoming the key to solving these problems. Traditional car manufacturers hope to use innovative technology to seize the opportunity in the increasingly fierce market competition, and even the "layman" Google has quietly carried out experiments on hundreds of thousands of kilometers of driverless cars. New energy vehicles are regarded as a panacea to solve the environmental problems and oil consumption dilemmas brought about by the rapid growth of automobiles, and battery management and motor drive technology have become the key to the future battle of the new energy vehicle market. In addition, user needs and government regulations are also pushing cars to have higher safety and richer intelligence in 2012.
Design safer and smarter cars
The "National Road Transport Industry" Twelfth Five-Year Plan "Development Plan Outline released recently stipulates that during the" Twelfth Five-Year Plan "period, dangerous goods transport vehicles, international road transport vehicles, more than three types of line and tourist passenger vehicles, and emergency The installation rate of the satellite positioning system to ensure the fleet vehicles reached 100%. Industry experts pointed out that automotive safety electronics is expected to become the "standard" of automotive safety facilities. A survey report by a well-known domestic media also showed that 80% of the respondents regard safety as the primary standard for car purchase. There is no doubt that in today's frequent traffic accidents, car safety is the focus of car consumption. At the same time, as a vehicle that brings great convenience to people's lives, its own driving convenience is also one of the hot spots in the auto market competition. In addition to Google ’s self-driving cars mentioned above, some high-end cars now have automatic parking, and General Motors recently announced that they are developing a new technology that will automatically find empty cars. Parking spaces and fully automatic parking process. Automobile intelligence is already an important trend in the development of automobiles today.
Vision-based advanced driver assistance systems can greatly improve driving safety and vehicle intelligence in many ways. By installing rear-view / front-view / side-view cameras and visual processing, the electronic control unit (ECU) can implement multiple functions to help the driver prevent risks in advance. Popular applications include: lane departure warning, high beam and low beam adjustment, traffic sign recognition, parking assistance, rear view / around view, and collision avoidance (see photo). According to data from industry market research institutions: 70% of cars now have a rear view function, and 30% of high-end cars have a front view function, and this proportion is expected to reach 60% by 2015.
Figure 1: Advanced driver assistance systems are widely used in automotive active safety
In terms of passive safety, the auxiliary protective safety system (SRS) including front airbags has become the standard configuration of many mid-range cars. With the increase in the number of airbags such as side airbags and curtain airbags, SRS is developing towards more advanced airbag systems. The future trend is to use two front airbags as standard equipment in low-end cars, while six or more airbags will appear in mid-range and high-end cars. At the same time, airbags will also tend to be intelligent and integrated.
A special report on automotive research from iSuppli shows that the market for advanced driver assistance systems will reach US $ 1.65 billion in revenue in 2011, a 57% increase from US $ 1.05 billion in 2010, and the growth rate will rise to 63% in 2012. As the world's leading provider of automotive electronics technology, ADI's observations are: At present, major global automotive suppliers and OEMs are using ADI's leading high-performance signal processing technology to implement and deploy various radar-based and Visual advanced driver assistance system.
These technologies that can bring great safety improvements to automobiles are spreading from the "patent" of high-end vehicles to middle and low-end vehicles, and lower-cost electronic device solutions will greatly shorten this process. For example, the highly integrated AD8283 automotive radar analog front-end chip launched by ADI in mid-2011 is such a product. It contains the receiving path signal conditioning and data acquisition circuit in a single chip, so that the radar system can receive more quantities. The signal is transmitted and decoded. More importantly, the chip enables car manufacturers to realize the on-board radar system that was previously implemented in high-end cars at a low cost. ADI's convergent processor Blackfin can provide mature and reliable high-performance video processing solutions, suitable for a variety of systems from single function to multi-function. The visual preprocessor integrated in ADI's new generation of processors can significantly reduce the burden on the processor, thereby reducing the performance requirements of the processor and further reducing the implementation cost of the system. In addition, ADI's optimized compiler and "Image Toolbox" algorithm library can maximize efficiency and MIPS, and the software-based structure helps users quickly launch distinctive terminal products. At the same time, ADI's rich product line also provides video decoders / encoders, video multiplexers / switches and video amplifiers, which can provide customers with system solutions.
The continuous advancement of semiconductor technology provides manufacturers with more leading choices. For example, in the MEMS products that are widely used in passive safety and active safety design, the integration of ADI's next-generation MEMS products will be higher (for example: the Integrated with low-g acceleration sensor, etc.). Highly integrated MEMS (ADXRS8XX with accelerometer and gyroscope integrated, ADXL2XX with low g and high g acceleration sensor integrated) are already under development.
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