Fujitsu technical experts: Vision-based active safety technology for automobiles
The safety of cars is getting more and more attention from people. Active safety systems can be used to warn drivers before accidents and prevent them from happening, so they are welcomed by many car consumers. At present, China is one of the countries with the largest number of deaths and injuries in traffic accidents in the world. As people pay more attention to driving safety, safety systems (including active safety systems) will gain more opportunities for rapid development. There are many types of automotive active safety systems currently applied, including ABS (anti-lock brake system), ESP (electronic stability program), LDWS (lane deviation warning system), night vision system, TPMS (tire pressure monitoring system) , AFS (Adaptive Headlight), EBA (Emergency Brake Assist System), EBD (Electronic Brake Force Distribution System), etc.
However, in general, China's active safety application market is still in the initial stage of development, and many automotive consumers have insufficient or incomplete knowledge of the importance of active safety systems. At the same time, because the market is very sensitive to price, most car manufacturers develop Only some highly-recognized systems, such as ABS, ESP, and TPMS, will be selected for the car models. Therefore, a few centralized applications such as ABS, TPMS, and ESP dominate the market structure. With the vigorous promotion of OEMs and TIer1, and the rapid improvement of the safety awareness of car users, the market of active safety systems is bound to usher in a period of rapid development.
Li Dan, Senior Product Engineer, Fujitsu Semiconductor (Shanghai) Co., Ltd.
In the current automotive safety application market, ISO 26262 is the latest road vehicle functional safety standard, which defines product management concepts for safety components, development processes (including system, software, and hardware development), support processes, and safety analysis. At the same time, the use of more advanced model-based software design methods can reduce the development difficulty and at the same time better ensure the reliability of safety systems (including active safety systems). The ISO26262 standard requires semiconductor manufacturers to consider higher security at the beginning of chip design to support the development of higher security system applications, such as redundant design of CPU cores (multi-core structure), self-diagnostic functions, and lock-step operation (Lock Step) functions and so on.
Fujitsu attaches great importance to the automotive active safety market. In terms of semiconductor devices, Fujitsu's latest FR81S series 32-bit MCU and 16FXS series 16-bit MCU are very suitable for active safety applications. Taking the FR81S series as an example, it provides a 5-stage pipeline, supports floating-point operations, MCU self-diagnostic modules, and other rich peripheral resources, which can meet most of the resource requirements of active safety systems for MCUs; Support Backup RAM, ADC range comparison function, single-line debugging and other features that are very helpful for system development. At present, FR81S series products are widely used in electric vehicle main drive motor control system, TPMS, LDWS and other safety systems.
In addition, Fujitsu can provide a variety of system solutions to help customers achieve the purpose of reducing development difficulty, shortening development time, and reducing system costs, such as the use of software and hardware platforms, and the effective use of the network to achieve complex functions, based on the model Software development method (AutoSAR) and so on. At present, one of Fujitsu ’s research focuses on active security is the vision-based active security system. Fujitsu can provide the world ’s leading three-dimensional surround view system (OmniView system), which is stitched into a three-dimensional through the video input of four cameras Two-dimensional) visual field can effectively avoid the misjudgment caused by the two-dimensional overhead system.
We believe that automotive electronic active safety systems will be more and more valued and have a good market prospect. Active safety technology based on vision can achieve many complex functions and provide drivers with more intuitive and friendly warnings. A very potential active safety technology, its practical applications include surround view systems, night vision systems, object detection, head-up displays and so on.
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