In an ADAS system, ultrasonic sensors play an important role in the parking of vehicles, avoiding obstacles in blind spots, and detecting pedestrians. One of the companies providing ultrasound sensors for ADAS systems is Murata (http://www.murata.com/). They provide ultrasonic sensors for up to 10 meters, which are optimal for a Parking Assistance System (PAS). The following diagram shows where ultrasonic sensors are placed on a car:
Placement of ultrasonic sensors for PAS
Let's now look at LIDAR and RADAR and learn how they are used in a self-driving car.