title: A flex-compressive-mode piezoelectric transducer for mechanical vibration/strain energy harvesting.
abstract: A piezoelectric transducer for harvesting energy from ambient mechanical vibrations/strains under pressure condition was developed. The proposed transducer was made of two ring-type piezoelectric stacks, one pair of bow-shaped elastic plates, and one shaft that pre-compresses them. This transducer works in flex-compressive (F-C) mode, which is different from a conventional flex-tensional (F-T) one, to transfer a transversely applied force F into an amplified longitudinal force N pressing against the two piezo-stacks via the two bowshaped elastic plates, generating a large electric voltage output via piezoelectric effect. Our experimental results show that without an electric load, an F-C mode piezo-transducer could generate a maximum electric voltage output of up to 110 Vpp, and with an electric load of 40 κΩ, it a maximum power output of 14.6 mW under an acceleration excitation of 1 g peak-peak at the resonance frequency of 87 Hz.
authors.affiliation: Department of Advanced Materials & Nanotechnology, College of Engineering, Peking University, Beijing, China.
authors.forename: Xiaotian
authors.initials: X
authors.lastname: Li
authors.forename: Mingsen
authors.initials: M
authors.lastname: Guo
authors.forename: Shuxiang
authors.initials: S
authors.lastname: Dong
mesh_terms: D017076:Computer-Aided Design / Q000295:instrumentation; D004581:Electronics / Q000295:instrumentation*; D004735:Energy Transfer; D004867:Equipment Design / Q000295:instrumentation; D019544:Equipment Failure Analysis / Q000379:methods; D019563:Mechanics; D017711:Nonlinear Dynamics; D011312:Pressure; D013314:Stress, Mechanical; D014159:Transducers; D014732:Vibration