Presumably, the key word you hear the most in the field of automotive electronics in recent years is "car networking", but as a practitioner in the electronics industry, there is still a word that can not be missed, that is, "automobile safety."
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With the rapid development of China's auto industry and the increase of private car users, the traditional concept of car safety is gradually changing. The traditional concept of safety is very passive. For example, seat belts, airbags, bumpers, etc. are more passive methods. The occurrence of traffic accidents cannot be effectively solved, and with the advancement of technology, the safety of automobiles has been refined, and the trend of active safety development of automobiles is very obvious.
In particular, countries such as Europe, the United States, and China have adopted stricter and stricter requirements on vehicle driving safety through legislation, which has made relevant industry organizations pay more and more attention to active safety. Relevant laws and regulations are gradually improved. Active safety systems are in the car evaluation system. The weight of the weight will become heavier and heavier. These have greatly promoted the advancement of automotive active safety technology.
Active safety may include electronic stability systems, warning systems, ABS, EBD, etc. to alert or assist the driver to safely drive the vehicle before an accident occurs. The development direction of the car's active safety system is more predictive of the driver's intentions and potential accidents. The technical means are used to compensate the driver's judgment and the control of the vehicle.
Automotive active safety systems include sensors, electronic stability control units, driver assistance control units, radar, cameras, and more. These are all inseparable from electronic technology. Production companies and R&D institutions continue to introduce the most advanced safety technology and apply it to mass production vehicles, from anti-lock braking system abs, electronic braking force distribution EBD to electronic stability program ESP, brake assist system BAS, development of electronic technology It has played a significant role in improving the safety performance of automobiles.
The importance of electronic technology to the active safety of automobiles is self-evident. Relevant data show that automotive electronic systems now account for 10-15% of the cost of complete vehicles, and the cost of automotive electronics for mid- to high-end models is as high as 20-25%; With the increase in the requirements of car safety, energy saving, human-car interaction, assisted driving, car networking and audio-visual entertainment systems, the cost of automotive electronic systems will reach 30-50% in the future, of which embedded technology is the most The key core. Especially in the field of active security, electronic technology is a vital part. In China, such as Guangzhou Automobile Group (Honda, Toyota, Mitsubishi, Fiat, Gio), Dongfeng Nissan, FAW Volkswagen, Changan logo Citroen, BYD, Beiqi Futian and other vehicle companies, automotive electronic systems are becoming the most valued part. And automotive electronics companies such as Denso, Bosch, Delphi, China, Siemens, United Automotive Electronics, Desai, and Hangsheng are also actively researching and developing relevant innovative technologies to compete for this market.
For example, the automatic emergency braking system (AEB), which is one of the active safety systems, allows the brakes to be automatically braked under emergency braking. The AEB is mainly composed of a distance measuring module, a data analysis module and an actuator module. The composition, in which the core of the ranging module includes microwave radar, laser radar and video system, can provide safe, accurate and real-time image and road condition information of the road ahead. The AEB system uses radar to measure the distance from the preceding vehicle or obstacles, and then uses the data analysis module to compare the measured distance with the alarm distance and the safety distance. When the alarm distance is less than the alarm distance, the alarm prompts, and when it is less than the safety distance, even if it is When the driver does not have time to step on the brake pedal, the AEB system will also start, so that the car automatically brakes, thus escorting safe travel.
Now Volvo, Mercedes-Benz, Volkswagen, Ford, Subaru and other brands have been equipped with this automatic emergency braking system, using radar, ultrasound, camera and other equipment to detect the road ahead, after detecting the risk of collision, the on-board computer will automatically emergency brake. Manufacturers such as Volvo and Mercedes-Benz, which already have similar technologies, are also working to improve the working range and accuracy of automatic brakes, such as using the cutting-edge electronics to improve the response speed of AEB.
Not only AEB, but also ESP electronic stability system, tire pressure monitoring, blind spot detection, identification technology, reversing image, parking assist system, anti-theft system and other automotive active safety technologies in cutting-edge electronic technology (covering 3D/2D graphics processor GPU, Driven by floating-point DSP, processor core, wireless communication technology, etc., the stability and cost performance of equipment operation are improving, and various indicators continue to improve.
In the field of ADAS image processors, major chip manufacturers are also strongly deploying, such as ADI's advanced ADAS vision processor, TI's Jacinto series SoC heterogeneous processor with integrated DSP processor and FPGA chip, Renesas Electronics, STMicroelectronics, Freescale, Infineon, and domestic chip makers such as Weiquan, Yijing, etc., are actively developing more innovative ADAS application chips based on their own advantages, including dedicated image processors or digital Signal processor.
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