Piezoelectric Pressure Transducer with Acoustic Absorbing Rod

Lab-on-A-Chip With Fluid Acoustic Microagitation - Piezoelectric Polymer beta-PVDF used as Ultrassonic Transducer

The main objective of this article is to describe the development of a fully-integrated disposable lab-on-achip for point of care testing and monitoring of biochemical parameters in biological fluids. The lab-on-achip is composed mainly by two dies: the fluid and the detection. The fluid die, fabricated in SU-8, comprises three microfluidic cuvettes, containing the fluids into analysis, and a β...

Lateral cavity acoustic transducer.

We present a lateral cavity acoustic transducer (LCAT) capable of pumping and mixing fluids within a microfluidic system using an acoustic energy source from an external piezoelectric buzzer. The device is capable of pumping at flow rates of approximately 250 nl min(-1) and real-time mixing in low flow rate (<1 microl min(-1)) devices typical in microfluidic systems.

Piezoelectric Transducer Modeling: with System Identification (SI) Method

System identification is the process of creating models of dynamic process from inputoutput signals. The aim of system identification can be identified as “ to find a model with adjustable parameters and then to adjust them so that the predicted output matches the measured output”. This paper presents a method of modeling and simulating with system identification to achieve the maximum fitness ...

Micromachined piezoelectric ultrasonic transducer with ultra-wide frequency bandwidth

Aluminum Nitride Piezoelectric Micromachined Ultrasound Transducer Arrays

Air-coupled piezoelectric micromachined ultrasound transducer arrays, operating at ~190 kHz, have been fabricated utilizing an aluminum nitride piezoelectric layer. Improved fabrication processes have reduced the frequency variation seen in our previous work with single transducers resulting in arrays of transducers with resonant frequencies (fn) that match within the fractional half-power band...