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Two theoretical models of infrasound piezoelectric hydrophone (IPH) are proposed to meet the requirements of high sensitivity and low frequency hydrophone. The IPH has a laminated structure by using piezoelectric plates with polarization along thickness. Two connection forms of piezoelectric plates, in series and in parallel, are taken into consideration. The effect of structural parameters on the...
This paper proposes a piezoelectric annular bimorph power harvester (PABPH) aiming at scavenging mechanical vibration energy exists in the ambient environment. Abundant energy of the ambient vibration mainly contains in low frequency. In order to decrease the resonate frequency and miniaturize the device, finite element model is present for the harmonic and modal analysis of the PABPH. Numerical results...
Based on the theory for small fields superposed on finite biasing fields, the finite element model of a high frequency, double-layer plate, thickness-shear vibration pressure sensor under biasing field is set up, and a biasing field finite element method (BFFEM) is proposed. Both ends of the piezoelectric plate, vibrating in thickness-shear mode, are subjected to bending moment and axial force, excited...
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