An automated monitoring strategy for ultrasonic amplitude prediction of piezoelectric transducer

development and implementation of an optimized control strategy for induction machine in an electric vehicle

in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...

1-3 Piezoelectric Composites for High Power Ultrasonic Transducer Applications

In this paper, we demonstrated that 1-3 PZT/polymer composites, fabricated using PZT-4 ceramic and a polymer possessing a high glass transition temperature and low loss, can be used as high power ultrasonic transducer materials for high intensity focused ultrasound (HIFU) applications. The mechanical quality factor of the 1-3 composite with 64% ceramic volume fraction is over 200. The dielectri...

Horn-Type Piezoelectric Ultrasonic Transducer: Modelling and Applications

Micromachined piezoelectric ultrasonic transducer with ultra-wide frequency bandwidth

A MEMS Ultrasonic Transducer for Monitoring of Steel Structures

Ultrasonic methods can be used to monitor crack propagation, weld failure, or section loss at critical locations in steel structures. However, ultrasonic inspection requires a skilled technician, and most commonly the signal obtained at the time of any inspection is not preserved for later use. A preferred technology would use a MEMS device permanently installed at a critical location, polled r...