TY - JOUR
A1 - Melchor Rodríguez, Juan Manuel
T1 - Piezoelectric transducer design optimization
Y1 - 2013
UR - http://hdl.handle.net/10481/25129
AB - To respond to the design of a torsion sensor into mechanical ultrasonic tissue applications, it is necessary to use FEM Finite Element Models. Through a simpliﬁed analytical model of torsion transducer,
we determine the resonant frequency for a torque transducer ultrasonic waves. It is computationally validated. More speciﬁcally the idea is to reﬁne and optimize the design to be applied to the detection of preterm birth identifying changes in the consistency of the cervical tissue through the shear modulus measurements. Therefore, a model
with a disk transmitter and a ring receiver for easy accessibility was performed and sensitivity analysis to ﬁnd the range of optimal design values with this application was calculated. Therefore, it is neces-
sary to optimize the piezoelectric transducer model design regarding two types of parameters. On one hand the design parameters, and on the other hand the model parameters that characterize the specimen.
The forward problem is obtained by performing a three-dimensional ﬁnite element simulation. The experimental measurements are simulated by adding a gaussian noise as a percentage of the RMS of the numerically predicted signals. In addition, a semi-analytical estimate of the probability of detection (POD) is developed to provide
a rational criterion to optimize the experimental design.
KW - Finite element model (FEM)
KW - Piezoelectric ceramic materials (PZT)
KW - Probability of detection (POD)
LA - eng
ER -