A self-powered mechanical strain energy sensor

Elvin, Niell; Elvin, Alex; Spector, Myron

doi:10.1088/0964-1726/10/2/314

Cited by 195 publications

(122 citation statements)

References 5 publications

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“…Elvin et al [76] have explored the possibility of using the energy generated from a piezoelectric sensor to power a wireless link thereby realizing a self-powered wireless strain sensor. A 28 µm thick, 23 mm wide and 40 mm long piece of PVDF was attached to a four-point bending beam subject to cyclical loading.…”

Section: Other Piezoelectric Generatorsmentioning

confidence: 99%

Energy harvesting vibration sources for microsystems applications

Beeby

Tudor

White

2006

Meas. Sci. Technol.

2,606

1,468

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This paper reviews the state-of-the art in vibration energy harvesting for wireless, self-powered microsystems. Vibration-powered generators are typically, although not exclusively, inertial spring and mass systems. The characteristic equations for inertial-based generators are presented, along with the specific damping equations that relate to the three main transduction mechanisms employed to extract energy from the system. These transduction mechanisms are: piezoelectric, electromagnetic and electrostatic. Piezoelectric generators employ active materials that generate a charge when mechanically stressed. A comprehensive review of existing piezoelectric generators is presented, including impact coupled, resonant and human-based devices. Electromagnetic generators employ electromagnetic induction arising from the relative motion between a magnetic flux gradient and a conductor. Electromagnetic generators presented in the literature are reviewed including large scale discrete devices and wafer-scale integrated versions. Electrostatic generators utilize the relative movement between electrically isolated charged capacitor plates to generate energy. The work done against the electrostatic force between the plates provides the harvested energy. Electrostatic-based generators are reviewed under the classifications of in-plane overlap varying, in-plane gap closing and out-of-plane gap closing; the Coulomb force parametric generator and electret-based generators are also covered. The coupling factor of each transduction mechanism is discussed and all the devices presented in the literature are summarized in tables classified by transduction type; conclusions are drawn as to the suitability of the various techniques.

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Section: Other Piezoelectric Generatorsmentioning

confidence: 99%

Energy harvesting vibration sources for microsystems applications

Beeby

Tudor

White

2006

Meas. Sci. Technol.

2,606

1,468

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“…Using the nomenclature given by Elvin et al (2001 and, the constitutive equations for the vector resultant of a piezomechanical system are given by:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Evaluation of the sensitivity and fatigue performance of embedded piezopolymer sensor systems in sandwich composite laminates

Chrysochoidis

Gutiérrez

2015

Smart Mater. Struct.

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Evaluation of the sensitivity and fatigue performance of embedded piezopolymer sensor systems in sandwich composite laminates AbstractIt has been claimed that embedding piezoceramic devices as structural diagnostic systems in advanced composite structures may introduce mechanical impedance mismatches that favor the formation of intralaminar defects. This and other factors, such as cost and their high strain sensitivity, have motivated the use of thin-film piezopolymer sensors. In this paper, we examine the performance of sandwich composite panels fitted with embedded piezopolymer sensors. Our experiments examine both how such thin-film sensors perform within a structure and how the inclusion of sensor films affects structural performance. Strain-controlled tests on sandwich panels subjected to three-point bending under wide-ranging static and dynamic strains lead us to conclude that embedding thin piezopolymer films has no marked reduction on the tensile strength for a wide range of strain loading paths and magnitudes, and that the resilience of the embedded sensor is itself satisfactory, even up to the point of structural failure. Comparing baseline data obtained from standard surface-mounted sensors and foil gauges, we note that whereas it is possible to match experimental and theoretical strain sensitivities, key propertiesespecially the pronounced orthotropic electromechanical factor of such films-must be duly considered before an effective calibration can take place.

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“…3. Elvin [9] theoretically and experimentally investigated the use of self-powered PVDF strain sensors.…”

Section: Piezoelectric Energy Harvestingmentioning

confidence: 99%