It is a kind of high-tech device used mainly in the automotive industry, ultrasonic sensors that enable vehicles to find distances to obstacles or targets in their immediate vicinity.The sensors work by sending out ultrasonic waves and then measuring how long it takes for their echoes to return after hitting an object. Its main functions include parking assistance, obstacle detection and surveillance for blind spots.To forms of technology include: wide beam angles; the second technical component enabling high measurement precision and finally resistance against environmental factors such as dust, water or chemicals.All in all, ultrasonic sensors are indispensable with advanced driver-assistance systems (ADAS) and autonomous parking systems--while they also serve to enhance the general safety and convenience of cars.