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PRINCIPLE
PRINCIPLE
A device that uses the piezoelectric effect to measure changes in acceleration, pressure, strain, temperature or force by converting this energy into an electrical charge to a simple plate.
The word piezoelectric is derived from the Greek word piezen, which means to squeeze or press.
Application
Application
Transducer has a very good high frequency (HF) response, its principal use in HF accelerometers.
Alternating voltage applied to a crystal and will vibrate at its natural resonance frequency.
Characteristics of the piezoelectric effect is that it is reversible means when voltage is applied to them, they tend to change dimension along with certain plane.
quartz crystal structure is placed into an electric field, it will deform quartz crystal by an amount proportional to the strength of the electric field.
Piezoelectric Material
Piezoelectric Material
Barium Titanate
Lead Zirconate Titanate (PZT)
Rochelle salt
Advantage
Advantage
No need for external force
easy to handle and use as it has small dimensions
High-frequency response it means the parameter change very rapidly
Disadvantage
Disadvantage
It is not suitable for measurement in static condition.
It is affected by temperature.
The output is low so some external circuit is attached to it.
It is very difficult to give the desired shape to this material and also desired strength.
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