Piezoelectric transducer
By Team
SK.Ashraful Islam
Md. Maruf Hossain
191002102
191002258
Bishozit Chandra Das 191002365
EEE-205 ( DA )
faculty – Md. Tariqul Islam
CONTENTS
1.
Piezoelectric Effect
2.
Piezoelectric Transducers
3.
Materials used for the Piezoelectric Transducers
4.
Piezoelectric Transducers construction & working
process
5.
Advantages Piezoelectric Transducers
6.
Disadvantages Piezoelectric Transducers
7.
Limitations Piezoelectric Transducers
8.
Applications Piezoelectric Transducers
2
Piezoelectric
Effect
•
Certain materials that generate electric potential
•
Voltage when mechanical strain is applied to them
•
To change the dimensions along certain plane
•
Discovered in the year 1880 by Pierre and Jacques
Curie
3
Piezoelectric
Transducers
•
Work on the principle of PIEZOELECTRIC EFFECT
•
Forces are applied to some materials along certain
planes
•
Electric voltage can be measured easily by the
voltage measuring instruments
4
Materials used
for the
Piezoelectric
Transducers
•
Stability
•
High output
•
Insensitive to the extreme temperature and
humidity
•
Ability to be formed or machined into any shape.
5
Construction
and
working process
•
Piezoelectric crystal inserted between a solid base
and the force summing member.
•
Applied on the pressure port, the same force will fall.
•
Voltage produced will be proportional to the
magnitude of the applied force
6
High frequency response:
Advantages
of
Piezoelectric
Transducers
•
Offer very high frequency response
High transient response:
•
•
•
Detect the events of microseconds
Also give the linear output.
Small in size and have rugged construction.
7
Disadvantages
of
Piezoelectric
Transducers
•
It has high-temperature sensitivity
•
Crystals are water soluble and dissolve
•
Used for dynamic measurement
•
Needs high piezoelectric cable for electrical interface
•
Output obtained from the piezoelectric transducer is
low
8
Low Output:
•
•
Limitation
of
Piezoelectric
Transducers
Piezoelectric transducers is low
Circuit has to be connected.
High impedance:
•
•
•
Have high impedance
The auxiliary circuit, which have the
potential to cause errors in measurement.
To reduce these errors amplifiers high
input
Forming into shape:
•
Very difficult to give the desired shape
9
Application
of
Piezoelectric
Transducers
•
Useful for the dynamic measurements.
•
They can be used for studying high speed phenomenon
like explosions and blast waves.
•
Used along with the strain gauges for measurement of
force, stress, vibrations.
•
Used piezoelectric transducers to detect detonations in the
engine blocks.
•
Used in medical treatment, sonochemistry and industrial
processing
•
Used in Inkjet printers
•
Used in smartphone screens.
•
Used in lighters
10
Any questions?
THANKS!
11