An Environment Vibration Energy Harvester with Dumb-Bell Type Statically Indeterminate Bimorph

Abstract

Remote micro-sensors and embedded microelectronic devices develops rapidly resent years due to the arisen net of things and increasing civil, medical or military applications. In order to solve the root stress concentration problem in traditional piezoelectric harvester and enhance the power harvesting efficiency, a new type of harvester with dumb-bell shape statically indeterminate bimorph is developed. Numerical results shows that the driving force is borne by both two ends and the root stress is decrease a lot with the statically indeterminate set. The dumb-bell structure not only makes sure the root strength, but also saves the space at middle whose stress is comparatively small. So the new type of energy harvester can enhance its fatigue life at the same time keep its output power at a high level.

The Structure Design Techniques of the Embedded Piezoelectric Power Generating Device in Intelligent Building

“…In order to solve this problem and enhance the power harvesting efficiency the boundary design is taking into account. A new type of harvester with dumb-bell shape statically indeterminate bimorph is developed by Xue et al [3]. The harvester is clamped at two ends, the numerical results shows that the root stress is decrease a lot with the statically indeterminate set.…”