Piezoelectric Transducer

Piezoelectric Transducer

Def:

Piezoelectric transducers are a type of electroacoustic transducerthat convert the electrical charges produced by some forms of solid materials into energy. The word "piezoelectric" literally means electricity caused by pressure.

A transducer can be anything which converts one form of energy to another. Piezoelectric material is one kind of transducers. We squeeze this material or we apply force or pressure on this material it converts it into electric voltage and this voltage is function of the force or pressure applied to it. The material which behaves in such a way is also known aspiezoelectric sensor.

The electric voltage produced by piezoelectric transducer can be easily measured by voltage measuring instruments, which can be used to measure stresses or forces. The physical quantity like mechanical stress or force cannot be measured directly.

Therefore, piezoelectric transducer can be used.

Application of Piezoelectric Materials?

1. In microphones, the sound pressure is converted into electric signal and this signal is ultimately amplified to produce louder
sound.
2. Automobile seatbelts lock in response to a rapid deceleration is also done by piezoelectric material.
3. It is also used in medical diagnostics.
4. It is used in electric lighter used in kitchens. Pressure made on piezoelectric sensor creates an electric signal which
ultimately causes flash to fire up.
5. They are used for studying high speed shock waves and blast waves.
6. Used in fertility treatment.
7. Used in Inkjet printers
8. It is also used in restaurants or airports where when a person steps near the door the door opens automatically. In this the
concept used is when person is near the door a pressure is exerted persons weight on the sensors due to which the electriceffect is produced and the door opens automatically.