Key technologies of DAS

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Key technologies of DAS [Copy link]

In addition to applying some special technologies in this field, several basic technologies applied in other fields are also very important for the research of DAS.
(I) Sensor technology
Sensor technology is of particular importance because the recognition of driving environment and driver behavior is the basic component of almost all advanced DAS. At present, DAS no longer uses a single sensor, but combines several sensors to achieve the expected function, such as radar and video. This sensor integration and location recognition technology requires more powerful sensor functions and cheaper computer hardware to form microcontrollers and digital signal processors. It includes vehicle sensors, external sensors and driver abnormal state sensors.
(II) Wired (CAN, Flexray) and wireless (Bluetooth) data transmission technology
With the development of integrated electronic technology composed of sensors and more and more systems inside and outside the car are connected by networks, wireless and wired transmission technologies such as CAN, Flexray, optical transmission and Bluetooth transmission technology and UMTS are more frequently used.
(III) The development trend of computer technology
is integration, intelligence, high speed, miniaturization and high reliability.
(IV) System and safety engineering
It is particularly important to combine software systems with different functions into a complete system. This is the idea of "integration", which gradually became dominant. Vehicle manufacturers and suppliers master the process of system and software work, and achieve the expected goals based on product function, quality, cost and timing, which plays a decisive role in the success of the system.
(V) Simulation technology
Today, whether it is performance research or system certification, these tasks cannot be completed without simulation technology. This process usually starts with offline simulation technology of system functions, and functional expansion is carried out through real-time tests on driving simulators. This method can be repeated and is not dangerous; then a drivable model is quickly formed and connected to the test bench, and finally the system is subjected to strength damage simulation tests.
In the future, many DAS developments will be impossible without driving simulators. The simplest reason is that there are great dangers when conducting road tests during the product development stage. Some systems, such as brake assistance systems, can only be properly tested on driving simulators to test their feasibility and effectiveness.
(VI) Driver and transportation research
Multidisciplinary driver and transportation research will play a key role. Research from psychology, sociology, economics, law, humanities and other aspects is of great significance to correctly grasp the relationship between "driver-vehicle-DAS". This work goes beyond traditional ergonomics research and is more suitable for understanding and simulating drivers' feelings and emotional behaviors. Under the guidance of sustainable development theory, the new theoretical system of transportation planning can meet the new requirements of transportation planning in the field of transportation, and also meet the new requirements of transportation infrastructure put forward by the development of intelligent transportation systems.