This paper introduces a novel multimodal piezoelectric harvester designed to convert mechanical vibrations into electricity, suitable for powering small-sized electronics. The harvester consists of a primary plate and four smart beams with integrated piezoelectric layers and proof masses. A finite element (FE) model is developed in COMSOL Multiphysics® 6.0 to estimate the output voltage and power of the device subjected to base harmonic excitation. Besides considering only a pure load resistor, as widely discussed in the literature, a practical read-out circuit is herein employed to assess the harvester performance under realistic conditions. The read-out circuit includes an AC-DC converter, storage capacitor and a load resistor to optimise energy management and power the load. The circuit is simulated in LTspice XVII® software to validate the results of the FE model, and to calibrate the circuit. After further validation of the FE model with the results of experimental modal analysis using shaker excitation, parametric studies are conducted to understand the harvester’s behaviour. The results demonstrate that the proposed scavenger effectively harvests vibratory energy from its first four modes over a frequency bandwidth of around 10 Hz, making it suitable for variety of low-frequency applications. Furthermore, it is revealed that the scavenger can generate a significant amount of power across a wide range of frequencies by incorporating a tunable load resistance in the system. The generated energy is found the be adequate for powering a wireless sensor node (WSN), including a microcontroller, temperature sensor, 3-axis accelerometer, and a wireless module.

A novel multimodal piezoelectric vibration energy harvester integrated with a practical read-out circuit / Askari, Mahmoud; Ghandchi Tehrani, Maryam; Brusa, Eugenio; Carrera, Anna; Delprete, Cristiana. - (2024). (Intervento presentato al convegno 31st International Conference on Noise and Vibration Engineering (ISMA 2024) tenutosi a Leuven (BE) nel September 9-11).

A novel multimodal piezoelectric vibration energy harvester integrated with a practical read-out circuit

Brusa, Eugenio;Carrera, Anna;Delprete, Cristiana
2024

Abstract

This paper introduces a novel multimodal piezoelectric harvester designed to convert mechanical vibrations into electricity, suitable for powering small-sized electronics. The harvester consists of a primary plate and four smart beams with integrated piezoelectric layers and proof masses. A finite element (FE) model is developed in COMSOL Multiphysics® 6.0 to estimate the output voltage and power of the device subjected to base harmonic excitation. Besides considering only a pure load resistor, as widely discussed in the literature, a practical read-out circuit is herein employed to assess the harvester performance under realistic conditions. The read-out circuit includes an AC-DC converter, storage capacitor and a load resistor to optimise energy management and power the load. The circuit is simulated in LTspice XVII® software to validate the results of the FE model, and to calibrate the circuit. After further validation of the FE model with the results of experimental modal analysis using shaker excitation, parametric studies are conducted to understand the harvester’s behaviour. The results demonstrate that the proposed scavenger effectively harvests vibratory energy from its first four modes over a frequency bandwidth of around 10 Hz, making it suitable for variety of low-frequency applications. Furthermore, it is revealed that the scavenger can generate a significant amount of power across a wide range of frequencies by incorporating a tunable load resistance in the system. The generated energy is found the be adequate for powering a wireless sensor node (WSN), including a microcontroller, temperature sensor, 3-axis accelerometer, and a wireless module.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2993165
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