Learn ADAS System Quickly

- Dec 14, 2019-

Adas (advanced driving assistant system) is the advanced driving assistant system.

Adas is a kind of active safety technology, which uses a variety of sensors installed on the vehicle to collect the environmental data inside and outside the vehicle at the first time, and carry out the identification, detection and tracking of static and dynamic objects, so as to enable the driver to detect the possible dangers in the fastest time, so as to attract attention and improve the safety.

Adas mainly uses sensors such as camera, radar, laser and ultrasonic, which can detect light, heat, pressure or other variables used to monitor the state of the vehicle, usually located in the front and rear bumpers, side mirrors, driving poles or windscreens of the vehicle.

The advanced assistant driving system usually includes:

  • Navigation and real-time traffic system TMC;

  • ISA (intelligent speed adaptation or intelligent speed advice);

  • Vehicle communication systems;

  • Adaptive cruise control (ACC);

  • Lane departure warning system (LDWS);

  • Lane change assistance;

  • Collision avoidance system or pre collision system;

  • Night vision;

  • Adaptive light control

  • Pedestrian protection system

  • Automatic parking

  • Traffic sign recognition

  • Blind spot detection

  • Driver fatigue detection

  • Hill Descent Control

  • Electric vehicle warning sounds system.

Blind spot detection system refers to the area that can't be seen in the left, right and inner rear-view mirrors. It is believed that many drivers have a deep impression on blind spot, which is also one of the accidents that often happen in many accidents. The blind spot detection system uses radar and sensors to detect the blind spot area behind the vehicle. When the blind spot area detects the vehicle approaching, it will provide warning to the driver and help the driver to minimize the chance of accidents.

The parking system of ADAS benefits many novices who can't park. Parking aid system is divided into two types, active and passive. The former system automatically controls the steering wheel to help the driver to complete the parking. Of course, the throttle, brake and gear shift are still controlled by the owner. The latter is composed of image (camera) and audio-visual (ultrasonic) sensing units, which provide more information around the vehicle body for the owner to master and reduce the chance of collision.

Lane departure warning system LDW this system is composed of camera, sensor and controller. The principle is to use the camera on the side of the car body or rear-view mirror to sample the identification line of the current driving lane, and then obtain the position of the current car in the lane through image processing. At this time, as long as the car deviates from the lane, the controller will send out an alarm signal, from sensing to sending out an alarm It only takes about 0.5 seconds to remind and wake up the driver in real time to avoid accidents.

The collision prevention system FCW detects the distance and speed between the vehicle and the vehicle ahead by the radar installed on the front of the vehicle. At the initial stage, it will send out a warning sound to remind the driver to pay attention to the distance between the vehicles. If the distance between the vehicles continues to draw close, the vehicle will first automatically lightly step on the brake, and gently pull the safety belt for 2-3 times to warn the driver. If the system determines that the collision is unavoidable, it will start the automatic emergency brake (AEB) after At the same time, the safety belt will be tightened immediately to fix the driver and reduce the injury after the accident.

The system can automatically adjust the illumination range and angle of the lamp according to different road conditions, environment, speed and weather conditions, so that the illumination range of the lamp can be more far-reaching, and it will not image the vision of other users, so as to provide safer and comfortable illumination for the driver and the vehicle. From AFS active turn headlight in the past to the combination of sensing now Many LED intelligent headlights belong to this system.

The night vision system can help the driver to automatically identify animals or large foreign objects in the night or in bad weather when the vision is unclear or unclear, and at the same time, warn the road conditions in front of the driver to avoid accidents. The way to distinguish is to use infrared to perceive the difference of heat, to distinguish the difference of people, animals, vehicles and environment. After processing, the image is transformed to clearly present the objects that could not be clearly seen in front of the driver, so as to reduce the driving risk.

The active gap control cruise system, ACC, is to continuously scan the road in front of the vehicle through the gap sensor installed in the front of the vehicle to know the speed and relative distance of the vehicle in front, and automatically detect the speed during driving. When the distance from the vehicle in front is getting smaller and smaller, it will correspondingly adjust its speed, maintain a safe distance with the vehicle in front, and reduce the occurrence of collision accidents, which is called The advanced version of the automatic cruise system can be seen in many models.

At present, most of the driver's physiological state monitoring systems use cameras to detect the driver's face, judge the degree of concentration and whether there is a symbol of drowsiness. In addition, the system also uses the driver's eye opening and closing frequency to identify the safety level and provide appropriate warning or assistance actions. If the driver's facial expression changes less, or even the situation of eyes closed, the vehicle The vehicle will alert the owner through sound and light to reduce