What is ADAS System?
ADAS system is a transitional stage to realize driverless, and advanced driver assistance system has attracted much attention in recent years. ADAS will use a variety of sensors to collect the environmental data inside and outside the vehicle to identify or track the static or moving people or objects, so that the driver can use active safety technology to detect the possible situation. Dangerous situations cause concern and improve safety in a short period of time.
ADAS system actually includes many different technologies, such as ACC adaptive cruise, AEB automatic emergency braking, TSR / TSI traffic sign recognition, BSD / BLIS blind spot detection, LCA / lcma lane change assistance, LDW lane departure advance warning.
Different manufacturers with different version may offer different function list. Watchdog offer industrial quality ADAS kits for car, taxi, truck and bus fleets.
Adas system is not autonomous driving. It can be said that the research focuses of ADAS. Adas is assistant driving, the core of which is environment perception, while automatic driving is artificial intelligence. However, ADAS can also be regarded as the premise of the automatic driving vehicle, to judge whether a system is a ADAS system or an autopilot system. The key is whether the system has decision-making parts.
The sensors used in ADAS system mainly include camera, radar, laser and ultrasonic, which can detect light, heat, pressure or other variables used to monitor the state of the vehicle. They are usually located in the front and rear bumpers, side mirrors, inside of the driving rod or on the windshield of the vehicle. The early ADAS technology is mainly passive alarm, when the vehicle detects potential danger, it will give an alarm to remind drivers to pay attention to abnormal vehicle or road conditions.
In recent years, the ADAS market has grown rapidly. Originally, this kind of system was limited to the high-end market, but now it is entering the middle end market. At the same time, many low-tech applications are more common in the field of entry-level passenger cars. The improved new sensor technology is also creating new opportunities and strategies for system deployment.
1.Blind spot detection system: BSD
Driver’s blind spot refers to the area that can’t be seen from the left, right and inside of three rear-view mirrors. I believe many drivers are deeply impressed by the blind spot. It is also one of the frequent accidents 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 to help the driver minimize the probability of accidents.
2. Parking Aid System:PAS
The parking system of ADAS benefits many novices who can’t stop. There are two types of parking aid systems, 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 switch still need to be controlled by the owner. The latter is composed of image (camera) and audio-visual (ultrasonic) as sensing units, which can provide more information around the car body for car owners to grasp and reduce the chance of collision.
3. 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 current position of the 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, the process only takes about 0.5 seconds, so as to reduce the cost Real time reminder, wake-up driving, to avoid accidents.
4. Collision prevention system: FCW
The radar installed in the front of the car detects the distance and speed between the car and the vehicle in front. At the initial stage, it will send out a warning sound to remind the driver to pay attention to the distance between the car and the vehicle. If the distance between the car and the vehicle continues to shorten, the vehicle will first step on the brake and pull the safety belt gently for 2-3 times to warn the driver. If the system determines that there is no way to avoid the collision, it will pull the safety belt immediately after starting the automatic emergency brake (AEB) Tighten the safety belt to fix the driver and reduce the injury after the accident.
5. Road light system
This system can automatically adjust the lighting range and angle of the lamp according to different road conditions, environment, speed and weather conditions, so that the lighting range can be more far-reaching, and it will not image the sight of other users, so as to provide safer and more comfortable lighting for the driver and the vehicle. From AFS active steering headlamp in the past to multiple LED intelligent lamps combined with sensors now All of them belong to the category of this system.
6. Night vision system
It can help the driver to automatically identify animals or large foreign bodies at night or in bad weather when the sight is not clear, and warn the driver of the road conditions in front to avoid accidents. The way to distinguish is to use infrared to sense the difference of heat, distinguish the difference of people, animals, vehicles and the environment, and transform it into an image after processing, so as to clearly present the originally unclear objects in front of the driver’s eyes, so as to reduce the driving risk.
7. Active distance control cruise system: ACC
The distance sensor installed in the front of the vehicle continuously scans the road in front of the vehicle to know the speed and relative distance of the vehicle in front. It will automatically detect the speed when driving. When the distance between the vehicle and the vehicle in front is getting smaller and smaller, it will adjust its own speed to keep a safe distance from the vehicle in front and reduce the occurrence of collision accidents. That is, the so-called advanced version of automatic cruise system This system can be seen on many models.
8. Driver status monitoring
At present, most of the systems use cameras to detect the driver’s face to judge the degree of concentration and whether there is a sign of dozing. In addition, the system uses the frequency of the driver’s eyes to identify the safety level and provide appropriate warning or assistance action. If the driver’s facial expression changes less, or even close his eyes, the vehicle will pass the sound and light To alert car owners to reduce accidents.