Ultrasonic transducers are piezoelectric ceramics that resonate at ultrasonic frequencies and convert electrical signals into mechanical vibrations through the piezoelectric effect of the material. Ultrasonic transducers and ultrasonic sensors are devices that generate or sense ultrasound energy. They can be divided into three broad categories: transmitters, receivers and transceivers. Transmitters convert electrical signals into ultrasound, receivers convert ultrasound into electrical signals, and transceivers can both transmit and receive ultrasound.

When a transducer is used as a transmitter, the electrical oscillation signal sent from the excitation source will cause changes in the electric or magnetic field in the transducer's electrical energy storage element, thereby altering the mechanical vibration system of the transducer through some effect. 

Generate driving force to vibrate, thereby driving the medium in contact with the mechanical vibration system of the transducer to vibrate and radiate sound waves into the medium.

Application:

The application of ultrasonic transducers is very extensive, which can be divided into industries such as industry, agriculture, transportation, daily life, medical treatment, and military. According to the implemented functions, it is divided into ultrasonic processing, ultrasonic cleaning, ultrasonic detection, detection, monitoring, telemetry, remote control, etc; Classified by working environment into liquids, gases, organisms, etc; Classified by nature into power ultrasound, detection ultrasound, ultrasound imaging, etc.