TY - GEN
T1 - Indirect impact based piezoelectric energy harvester for low frequency vibration
AU - Ju, S.
AU - Ji, C. H.
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/8/5
Y1 - 2015/8/5
N2 - This paper presents an impact based piezoelectric vibration energy harvester using freely movable metal spheres as proof mass and an MFC (Macro Fiber Composite) beam as a piezoelectric cantilever. External vibration is transformed into free motion of metal spheres inside the channels and impact between the metal sphere and channel end induces a vibration of the MFC beam to generate electric power. A proof-of-concept device having the form-factor of a conventional wristwatch has been designed and tested to harvest energy from low frequency human-body-induced vibrations. Geometry at both ends of the cavities has been optimized to effectively transmit energy to piezoelectric cantilever and thus achieve a higher output power. For a device having an effective volume of 4.59cm3, maximum peak-to-peak open circuit voltage of 54V and RMS output power of 621μW have been achieved, when the fabricated energy harvester was mounted on a wristwatch and shaken manually.
AB - This paper presents an impact based piezoelectric vibration energy harvester using freely movable metal spheres as proof mass and an MFC (Macro Fiber Composite) beam as a piezoelectric cantilever. External vibration is transformed into free motion of metal spheres inside the channels and impact between the metal sphere and channel end induces a vibration of the MFC beam to generate electric power. A proof-of-concept device having the form-factor of a conventional wristwatch has been designed and tested to harvest energy from low frequency human-body-induced vibrations. Geometry at both ends of the cavities has been optimized to effectively transmit energy to piezoelectric cantilever and thus achieve a higher output power. For a device having an effective volume of 4.59cm3, maximum peak-to-peak open circuit voltage of 54V and RMS output power of 621μW have been achieved, when the fabricated energy harvester was mounted on a wristwatch and shaken manually.
KW - Indirect impact
KW - Macro fiber composite
KW - Vibration energy harvesting
UR - http://www.scopus.com/inward/record.url?scp=84955464196&partnerID=8YFLogxK
U2 - 10.1109/TRANSDUCERS.2015.7181325
DO - 10.1109/TRANSDUCERS.2015.7181325
M3 - Conference contribution
AN - SCOPUS:84955464196
T3 - 2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015
SP - 1913
EP - 1916
BT - 2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 18th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2015
Y2 - 21 June 2015 through 25 June 2015
ER -