Sensor nodes are innovative devices that can perform measurements on a large scale and communicate over a network. One of the most significant problems regarding the sensor nodes is how to supply power to a large number of devices. For this reason, they greatly benefit from energy harvesting techniques which can provide energy recovered directly from the environment. A study of the design and the modeling of an autonomous sensor node, powered by a vibrational piezoelectric harvester, is reported here. Subject of the first part of the analysis is a piezoelectric bimorph: an analytical model is proposed in order to estimate the performance, giving particular attention to the optimal mechanical and electrical parameters. The model is then validated through experimental tests, assuming different kinds of real scenarios. Then the results are used to design a device that can benefit from this harvester. In particular a wireless sensor node is developed, for which the energy scavenging ensures energy autonomy and long-term operability. Thanks to a particular harvesting circuit and opportune algorithms for energy management, this system is able to extract energy from vibrations and store it into capacitors. The embedded accelerometer and a wireless module make this device ideal for Structure Health Monitoring purposes.
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ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis
July 25–27, 2014
Copenhagen, Denmark
Conference Sponsors:
- International
ISBN:
978-0-7918-4585-1
PROCEEDINGS PAPER
Design of a Wireless Sensor Powered by a Piezoelectric Energy Harvester
Damiano Milani,
Damiano Milani
Politecnico di Milano, Milano, Italy
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Marco Bassetti,
Marco Bassetti
Politecnico di Milano, Milano, Italy
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Francesco Braghin,
Francesco Braghin
Politecnico di Milano, Milano, Italy
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Gisella Tomasini
Gisella Tomasini
Politecnico di Milano, Milano, Italy
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Damiano Milani
Politecnico di Milano, Milano, Italy
Marco Bassetti
Politecnico di Milano, Milano, Italy
Francesco Braghin
Politecnico di Milano, Milano, Italy
Gisella Tomasini
Politecnico di Milano, Milano, Italy
Paper No:
ESDA2014-20583, V003T15A020; 7 pages
Published Online:
October 23, 2014
Citation
Milani, D, Bassetti, M, Braghin, F, & Tomasini, G. "Design of a Wireless Sensor Powered by a Piezoelectric Energy Harvester." Proceedings of the ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. Volume 3: Engineering Systems; Heat Transfer and Thermal Engineering; Materials and Tribology; Mechatronics; Robotics. Copenhagen, Denmark. July 25–27, 2014. V003T15A020. ASME. https://doi.org/10.1115/ESDA2014-20583
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