Why use ultrasonic transducer sensors for drone design

Most drones use various sensing technologies for autonomous navigation, collision detection, and many other functions. Ultrasonic sensing is particularly helpful for UAV landing, hovering and ground tracking.

The drone landing of ultrasonic wind vane transducer assist is a function of the ultrasonic transducer wind vane. It can detect the distance between the bottom of the drone and the landing area, determine whether the landing point is safe, and then slowly descend to the landing area. Although GPS monitoring, air pressure sensing and other sensing technologies contribute to the landing process, ultrasonic sensing is the main and most accurate basis for UAVs in this process. Most drones also have hovering and ground tracking modes, which are mainly used to capture footage and land navigation, where ultrasonic sensors help keep the drone at a constant height above the ground.

The definition of ultrasound is the use of sound waves with a frequency higher than the upper limit of human hearing.

Ultrasonic waves can pass through various media (gas, liquid, solid) to detect objects that do not match the acoustic impedance. The ultrasonic transducer for ultrasonic flowmeter is the distance per unit time when a sound wave propagates in an elastic medium. For example, in dry air at 20°C (68°F), the speed of sound is 343 meters per second (1,125 feet per second). The attenuation of ultrasonic waves in the air increases with frequency and humidity. Therefore, due to excessive path loss/absorption, air-coupled ultrasound is usually limited to frequencies below 500kHz.