How to classify ultrasonic transducer?

How to classify ultrasonic transducer?

Ultrasonic transducer has a wide range of applications, more models and categories, and the transducers are mainly made of piezoelectric ceramics, single crystal, composite materials and magnetostrictive materials, etc., among which piezoelectric ceramics are used more, here is a simple introduction to the classification of piezoelectric ultrasonic transducers:

1. According to the transmission medium of sound wave during the working process of transducer

A, gas transducers: using gas as the transmission medium of sound waves, such as air ranging and gas flow transducers;

B, liquid transducers: using liquid as the transmission medium of sound waves, such as underwater ranging and liquid flow transducers;

C, solid transducers: solid as a sound wave media, such as non-destructive testing transducers basically belong to this class.

2, according to the role of the transducer in the working process

A, emission transducer: the transducer is only used to emit sound waves (signals);

B, receiving transducer: the transducer is only used to receive sound waves (signals);

C, transceiver common transducer: transducer is used to transmit and receive sound waves (signals);

3, according to the vibration mode of the transducer

A, sandwich/longitudinal oscillator transducer: according to a certain structure of mechanical parts and piezoelectric ceramics by prestressing together, such as ultrasonic cleaning and welding transducers are generally belong to this type;

B, bending vibration (laminated) transducer: transmits and receives sound waves (signals) in the mode of bending vibration, such as the transducer used on the reversing radar belongs to this type;

C, ordinary/conventional transducer: only the use of piezoelectric ceramics alone, the use of its own various vibration modes, through the adhesive fixed seal in the shell, this type of transducer is more common, non-destructive testing transducers mostly belong to this type;

D, other vibration mode transducers: such as bending type, cymbal type, etc., but the application is less, and it is not listed here;

4, according to the bandwidth of the transducer: there are broadband and narrowband transducers, and more are used on underwater acoustic

5, according to the temperature resistance of the transducer: ordinary type, medium temperature type and high temperature transducer;

6, according to the pressure resistance of the transducer: ordinary type and high pressure transducer;

7, according to the transducer frequency: low frequency, medium frequency and high frequency transducer;

Transducer classification is more, the above listed part of the classification form, for reference only.