Title :
Scavenging energy from human body: design of a piezoelectric transducer
Author :
Renaud, M. ; Sterken, T. ; Fiorini, Paolo ; Puers, R. ; Baert, K. ; Van Hoof, C.
Author_Institution :
Interuniv. Microelectron. Center, Leuven, Belgium
Abstract :
The present work concerns the concept and the modeling of a device for transforming a part of the mechanical energy originating from human limb motion into electrical energy. The device is formed by a frame containing a free moving mass. Useful electrical power is generated by the impact of this mass on piezoelectric cantilevers positioned at the end of the frame. In order to evaluate device performances a detailed analysis of the dynamics of the system is coupled to a model of the piezoelectric transducer. It is found that an optimized device, when mounted on the human wrist, can theoretically generate up to 40 μW/cm3.
Keywords :
direct energy conversion; electric generators; impact (mechanical); piezoelectric transducers; electrical power generation; free moving mass containing frame; human body energy scavenging; human limb motion mechanical energy; human wrist mounted device; kinetic energy scavenger; mechanical impact energy; nonresonant systems; piezoelectric transducer; Biological system modeling; Coupled mode analysis; Humans; Mechanical energy; Performance analysis; Performance evaluation; Piezoelectric transducers; Power generation; Power system modeling; Wrist;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05. The 13th International Conference on
Print_ISBN :
0-7803-8994-8
DOI :
10.1109/SENSOR.2005.1496534
