What is the Basic Principle of Ultrasonic Sensors?

[LeKarter]

Ultrasonic sensors operate on the basic principle of converting ultrasonic signals into other forms of energy signals. Ultrasonic waves are mechanical waves with vibration frequencies higher than 20kHz, characterized by high frequency, short wavelength, minimal diffraction phenomena, and particularly excellent directionality, enabling them to propagate directionally like rays. Ultrasonic waves possess strong penetration capabilities in liquids and solids, especially in opaque solids. When encountering impurities or interfaces, ultrasonic waves produce significant reflections, forming echo signals. Additionally, they generate the Doppler effect when interacting with moving objects. Ultrasonic sensors are widely applied in industries, national defense, biomedical fields, and more.