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Investigation of Electrical Properties for Cantilever-Based Piezoelectric Energy Harvester

Ali Ahsan, Pasha Riffat Asim, Sheeraz Muhammad Abdullah, Butt Zubair, Elahi Hassan, Khan Afzaal Ahmed

Advances in Science and Technology. Research Journal

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2019

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Vol. 13, no 3

76--85

EN

In the present era, the renewable sources of energy, e.g., piezoelectric materials are in great demand. They play a vital role in the field of micro-electromechanical systems, e.g., sensors and actuators. The cantilever-based piezoelectric energy harvesters are very popular because of their high performance and utilization. In this research-work, an energy harvester model based on a cantilever beam with bimorph PZT-5A, having a substrate layer of structural steel, was presented. The proposed energy scavenging system, designed in COMSOL Multiphysics, was applied to analyze the electrical output as a function of excitation frequencies, load resistances and accelerations. Analytical modeling was employed to measure the output voltage and power under pre-defined conditions of acceleration and load resistance. Experimentation was also performed to determine the relationship between independent and output parameters. Energy harvester is capable of producing the maximum power of 1.16 mW at a resonant frequency of 71 Hz under 1g acceleration, having load resistance of 12 kΩ. It was observed that acceleration and output power are directly proportional to each other. Moreover, the investigation conveys that the experimental results are in good agreement with the numerical results. The maximum error obtained between the experimental and numerical investigation was found to equal 4.3%.

2

А Меаsuring Method for Gyro-Free Determination of the Parameters of Moving Objects

Dichev D., Koev H., Bakalova T., Louda P.

Metrology and Measurement Systems

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2016

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Vol. 23, nr 1

107--118

EN

The paper presents a new method for building measuring instruments and systems for gyro-free determination of the parameters of moving objects. To illustrate the qualities of this method, a system for measuring the roll, pitch, heel and trim of a ship has been developed on its basis. The main concept of the method is based, on one hand, on a simplified design of the base coordinate system in the main measurement channel so as to reduce the instrumental errors, and, on the other hand, on an additional measurement channel operating in parallel with the main one and whose hardware and software platform makes possible performing algorithms intended to eliminate the dynamic error in real time. In this way, as well as by using suitable adaptive algorithms in the measurement procedures, low-cost measuring systems operating with high accuracy under conditions of inertial effects and whose parameters (intensity and frequency of the maximum in the spectrum) change within a wide range can be implemented.

3

Czujniki i przetworniki zintegrowane do cyfrowych systemów pomiarowo-kontrolnych

Wrzuszczak M.

Zeszyty Naukowe. Elektryka / Politechnika Opolska

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2004

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Vol. 295, z. 53

655-660

PL

W artykule przedstawiono podział i możliwości pomiarowe przetworników inteligentnych oraz układów MEMS. Przedstawiono wymagania normy IEEE P1451 dotyczącej przetworników inteligentnych oraz ich współpracy w systemie pomiarowym.

EN

The paper deals with the smart transducer and micro-electromechanical systems. The recommendations of the EEEE P1451 norm relating to the intelligent transducers and their integration in the measurement system with the industrial busses or wireless technology has been discussed.