Pyroelectric effect in PZT thick films for thermal energy harvesting in low-power sensors

Abstract Thermal-electrical energy converters based on pyroelectric effect are investigated for energy harvesting and possible use in ultralow-power sensor modules. Different elements based on thick films of lead zirconate titanate (PZT) sandwiched between metal electrodes deposited on alumina substrate were fabricated and characterized. The charge extracted was stored into a capacitor comparing performances offered by different rectifying circuits. Results show that the harvested energy can be compatible with use in autonomous sensors working in low-duty-cycle switched-supply mode

Contactless electromagnetic switched interrogation of micromechanical cantilever resonators

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AUDIO CLASSIFICATION IN SPEECH AND MUSIC: A COMPARISON OF DIFFERENT APPROACHES

This paper presents a comparison between different techniques for audio classification into homogeneous segments of speech and music. The first method is based on Zero Crossing Rate and Bayesian Classification (ZB), and it is very simple from a computational point of view. The second approach uses a Multi Layer Perceptron network (MLP) and requires therefore more computations. The performance of the proposed algorithms has been evaluated in terms of misclassification errors and precision in music-speech change detection. Both the proposed algorithms give good results, even if the MLP shows the best performance

Thick film flow sensor based on the thermal time-of-flight principle

Baltimore, Maryland, US

Using ultrasonic to control robot arm positioning

3nonenoneMarioli, Daniele; Sardini, Emilio; Taroni, AndreaMarioli, Daniele; Sardini, Emilio; Taroni, Andre