The development of advanced driving assistance systems is becoming more sophisticated and extensive, and through different levels of automation defined towards the 'ultimate goal' of fully automatic driving, this car is constantly accumulating momentum, stimulating the automobile industry and consumers to develop a different Views and views, and consumers will certainly be affected by the evolution of this wave of car impact.
Some car drivers expect one day to travel while traveling from A to B. They do not need to drive their own, and are more secure and some other benefits, and some may be less likely to look for autopilot because the driving pleasure will be May disappear.
In fact, the technology in the automotive sector is taking a big step forward, and car manufacturers and front-line suppliers are working with advanced electronics manufacturers to complement their expertise and technology, and companies like ON Semiconductor Among them, power transmission, information and entertainment and other automotive electronics related areas.
Although ON Semiconductor is a semiconductor component manufacturer, its expanding automotive electronics portfolio and expertise means that more and more components can be integrated or combined with highly reliable system solutions Manufacturers and OEMs to drive new ADAS progress faster and more efficiently, and it is clear that from ADAS, advanced ADAS to fully automated vehicles, smart, secure and reliable wafer solutions are needed.
Many of the world's fields are clearly changing, and most of them are driven by technological advances, especially in the automotive sector where almost all discussions are focused on fully automated or unmanned vehicles. Overall, the attitude towards driving Is changing; the previous generation of driving can be said to be in the enjoyment of driving pleasure, some people even close to the worship of the car.Now, more and more people just want to quickly, safely and efficiently from A to B land.
Safety has played a key driver in the process of automating the car, according to the World Health Organization (WHO) in 2017 statistics show that 1.25 million people die each year from road traffic accidents and 20 million to 50 million People are injured or disability, as pointed out by the US Department of Transportation (DOT) in May 2016, the vast majority of these road traffic accidents are man-made mistakes, the United States each year more than 2 million traffic accidents, of which 94% In the driver's mistakes.
Innovation or evolution
The development of automatic driving vehicles will be rapid evolution, not innovation. Since the 1980s, solid research has continued to accumulate kinetic energy, and now 50 companies are actively developing autopilot cars, some important university research projects more To further enhance the potential of the car.
Today, the electrification of automotive functions is quite common, and sophisticated electronic components are widely used in key areas such as powertrain, body, interior, lighting and active safety systems, and these systems are evolving, with one of the main trends being sensor and in-vehicle The combination of various functions, in order to achieve the integration of the automatic driving car.
Today, many vehicles have used automatic emergency braking, lane departure warning system, active cruise control, and blind spot monitoring and automatic parking and other functions.These systems are no longer limited to luxury vehicles, but extended to entry vehicles, these automation functions for the control The driving of the car offers a valuable contribution.
Tipping point
When the production of vehicles to the general recognition of the ADAS function, to re-evolve into a fully automated driving network of vehicles, the automotive industry will reach a turning point - the vehicle itself will provide integrated monitoring.With we increasingly rely on Automatic systems and large data, but also may include areas outside the car, functional security and the importance of the system's network security will be improved. ON Semiconductor has been aware of this, and by hardware and Software innovation solves these concerns.
The key to passing this tipping point is the effective 'sensor fusion'. When multiple systems are interconnected in the vehicle, more complex and safe decision making capabilities can be made, as well as avoidance of errors that could lead to accidents (redundancy) capacity will be improved
Sensor fusion
Vision is one of the increasingly important vehicle technologies used to support active safety features, including rear view and front view cameras and in-car ADAS.
However, different sensor types have their own special advantages, disadvantages - may be long or short distance performance, or operational conditions in inclement weather conditions, etc. Thus, it is possible to combine and handle a variety of sensor types Information, which helps to make the right decisions, responses and adjustments, which may include a combination of image sensors, radar and light (LiDAR).
Functional safety
The main sensor in most ADAS systems is the image sensor, which is also an important part of creating the overall functional safety of the system. With ISO 26262, the full range of vehicle safety covers the most advanced ASIL-A to the highest ASIL-D ASIL 's security level is determined by three factors: failure severity, probability of failure, and ability to control failure.
The safety of the sensor, as well as delays and high-speed fault detection, has been an important topic of concern for automotive OEMs, front-line manufacturers and sensor manufacturers. If ADAS (especially like automatic cruise control, avoid collision and pedestrian detection Measurement system) used by the image sensor without fault detection, may mean that a disaster is about to happen.
To detect any of these in thousands of potential failure modes, intensive processors are required and each failure requires a separate algorithm. In fact, at the system level it may not be possible to detect To the fault. The delay in the fault-tolerant system is the most concern of all system designers - that is, the time difference between the failure and the recovery of the system to the safe state. For safety, a fault must be detected before a dangerous event occurs And to be resolved.
As the vision sensor becomes more advanced, functional safety fault detection is moving from the ADAS system to the sensor itself, and the design can identify the fault by means of this built-in detection. The benefit of sensor detection is to improve fault detection Measuring power, and reducing the pressure on some ADAS system processing functions.
Today, many ADAS systems are still difficult to meet ASIL-B standards, and the number of systems that must meet ASIL-B requirements in the near future will increase significantly, and future ADAS systems must even meet the more stringent ASIL-C And ASIL-D regulations, such as ON Semiconductor and other industry manufacturers are actively cultivate this area, and in many image sensors built-in sophisticated security mechanisms to ensure complete functional safety.
In addition, ADAS image sensors combine toughness and reduce light flicker (LFM) to overcome the need for LED headlamps or backlights in the sensor field of view in order to meet specific functional requirements and stringent requirements for the operating environment of the vehicle Scene misjudgment), superior infrared performance and other functions, as well as in very bright or very low light conditions of operation.
to sum up
ADAS reflects the growing number of vehicles and the continued increase in functionality, but perhaps also the fastest growing areas towards the full automatic driving journey is accelerating the pace of the development of the automotive industry is about to reach the tipping point.Functional safety of advanced vision sensor Is the heart of the future ADAS system, which integrates these sensors with other automotive technologies and ensures that the safety of the network will drive the automotive industry quickly and beyond the tipping point of true automatic driving.