The advanced driver assistance system (hereinafter referred to as the ADAS system) is one of the hot spots in the automotive electronics market development in recent years and is also a rising star in the field of active safety. With the help of advanced radar, camera, digital signal processing and other technologies, the ADAS system can help improve driving The staff's ability to observe the environment also brings more powerful pre-processing and pre-alarm functions. According to reports, the National Highway Traffic Safety Administration (NHTSA) drafted a mandatory requirement to install a rear-view camera system on all new vehicles before 2014. The estimated loading capacity is about 16.6 million vehicles, which makes the application of the ADAS system once again. The focus of the market.
Li Jun, General Manager of ROHM China Technology Center
Although the global penetration rate of the ADAS system is still low (only about 5%), in the high-end car market (cars with prices above 50,000 euros), the loading rate of the ADAS system in recent years has shown There is a momentum of rapid growth (the growth rate of the high-end auto market itself has also been much higher than that of the mid / low-end auto market). In such markets, adaptive cruise control ACC using laser or radar technology, radar-based emergency braking assistance system EBA, 24GHz blind spot detection system BSD, reversing camera assistance system, etc. have been more commonly used, and multi-camera look around As some new application types such as systems are in the stage of market promotion, the overall goal of the future development of ADAS systems will be to achieve true fusion and interaction between different types of sensors such as vision, radar, ultrasound, etc. Proactive security services.
Li Jun, general manager of the ROHM China Technology Center, said that under the dual promotion of technological innovation and market demand, the development of automotive active safety systems will be reflected in both intelligent and interactive aspects. In terms of intelligence, the use of various types of sensors allows cars to provide safety services to passengers in various parts; while in terms of interaction, cameras and graphics processing technologies are used to identify obstacles, plus active collision avoidance, automatic cruise, The activation of various early warning devices, such as white line recognition, will bring rich road conditions and traffic information to the driver, and increase security for safe driving.
Vision application moves towards multi-technology integration
Vision-based active safety technology can provide drivers with more intuitive and friendly warnings. At present, more applications are made by using cameras at multiple angles such as front view, rear view, and around the body to stitch a panoramic image for driving. The staff provides real-life image information in the visually blind area when reversing the vehicle and detecting the front area, which plays a role in assisting driving. The implementation cost of this scheme is lower and the technology is more mature. In the application of the latest car camera systems, they are required not only to be able to observe the image, but also to be able to intelligently analyze and process the data from the camera to help the driver make more accurate judgments, and to cooperate with radar and ultrasound Together with other types of car sensors, it provides more advanced warning functions.
The future development trend of car camera system, Source: ApTIna
"For example, the camera-based LDW lane departure warning system uses a small camera installed behind the rear-view mirror to detect lane signs on the road, and issues warnings once the vehicle leaves the lane (turn signals are not used), such as steering wheel vibration, instrumentation The indicator light on the panel lights up, or a buzzer-like alarm to remind the driver to correct their route. Or a combination of radar and camera technology is used to determine whether the vehicle is based on the information from the camera and the lateral speed of the vehicle If you deviate from the lane, the driver will be alerted if you deviate from the lane, "said Narayan Purohit, the strategic marketing department of ApTIna.
To achieve a higher level of security protection, the ADAS camera must also have two functions of better quality video processing and image processing. Video processing is to properly process the raw data of the camera for the driver to view; and image processing It is to extract effective target motion and other information from the video stream for application analysis.
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