Piezo- Electric Transducers Flashcards
1
Q
What is a PE transducer used for
A
To measure force and pressure and in the generation and detection of ultrasound
2
Q
Where do PE transducers occur
A
Quartz, lead zirconite titanate, polyvinylidene difluoride etc
3
Q
What is the equation for charge
A
Q= dF
Charge= d coefficient x force
4
Q
What is the equation for voltage
A
V = gtP
Voltage = g coefficient x pressure
5
Q
What are the d and g coefficients
A
Specific to piezoelectric material and are interrelated
d= EEog
6
Q
What can charge be written as in terms of st
A
Q= kst
St- change in thickness
K- ECg
7
Q
What is a biomedical use
A
Sensors attached directly onto the skin to measure changes in arterial pressure
