The key point of ultrasonic is to probe into the formation, propagation, reading, signal analysis and processing of ultrasonic wave in various media and so on Ultrasonic physics and ultrasonic work are two key elements of ultrasonic science.

Ultrasonic physics is the basis of ultrasonic engineering projects, which can provide the necessary theoretical and experimental basis for different kinds of ultrasonic electronic applications.

The research objectives of ultrasonic engineering project mainly include the technical design and process research of ultrasonic generating, transmitting and reading equipment in various kinds of ultrasonic electronic applications.

Transducer is the energy conversion components, is a type of energy into another form of energy equipment, it can achieve electrical energy and sound energy conversion each other.

When ultrasonic wave propagates in the medium, it will cause many physical, chemical and biological effects, and the ultrasonic wave penetrates the strong, the information carries the quantity to be many, is convenient to complete the fast accurate on-line non-destructive examination technology and the high quality confirmation diagnosis. At present, a wide variety of Ultrasonic transducer are widely used in industrial production, agriculture and animal husbandry, national defence security, the biomedical industry and scientific research.

When the transducer is in an emitting state, it converts electrical energy into mechanical kinetic energy, which is then converted into sound energy.

An electrical oscillation signal sent from the output stage of the excitation power supply will cause a change in the electric or magnetic field in the electrical energy storage element in the transducer, such changes in the electric or magnetic field, depending on the action, create a force that pushes the mechanical vibration system of the transducer into a state of vibration, then, the medium in contact with the mechanical vibration system of the transducer vibrates and radiates sound waves into the medium.

When the transducer is in a read state, the sound energy is converted into mechanical kinetic energy, which is then converted into electrical energy.

Thus, the mechanical vibration system of the transducer vibrates, depending on some physical effect. The electric or magnetic field in the energy storage element of the transducer is changed accordingly, so that the electrical output terminal of the transducer forms a voltage and current corresponding to the acoustic signal.

The Ultrasonic welding is to use the electrical box to convert electricity into high-frequency and high-voltage signals, which are then converted into high-frequency mechanical vibrations by the transducer system and applied to plastic products, when the temperature reaches the melting point of the product itself, the interface of the product melts rapidly, and at the same time, the product is cooled and shaped under a certain pressure, to achieve extreme fusion.