The recent proliferation of microscale devices has raised the issue of energy harvesting for replacing batteries that present maintenance and recycling problems. Particularly, piezoelectric seismic microgenerators offer the advantages of easy maintenance and high power output, but are very sensitive to frequency drifts that can dramatically decrease their performance. The purpose of the present article is to expose a technique to ensure that the harvester resonance frequency matches the base motion frequency, without any external intervention. The principles of the proposed method rely on ultralow-cost frequency sensing combined with an energy-efficient stiffness tuning, through the use of an additional actuator. Experimental results carried out to validate the model show that such an approach permits increasing the effective bandwidth of the structure by a factor of 4 in terms of mechanical vibrations and having a 100% frequency band gain in terms of total power output of the device (i.e., taking into account the energy spent by the actuation). The total energy produced by the harvesting device, taking into account the actuation cost, is discussed as well.
Anton, S.R. and Sodano, H.A.2007. ‘‘A Review of Power Harvesting using Piezoelectric Materials (2003-2006),’’ Smart Mater. Struct. , 16:R1-R21.
2.
Badel, A., Guyomar, D., Lefeuvre, E. and Richard, C.2005. ‘‘Efficiency Enhancement of a Piezoelectric Energy Harvesting Device in Pulsed Operation by Synchronous Charge Inversion,’’J. Intell. Mater. Syst. Struct., 16:889-901.
3.
Badel, A., Lagache, M., Guyomar, D., Lefeuvre, E. and Richard, C.2007. ‘‘Finite Element and Simple Lumped Modeling for Flexural Nonlinear Semi-passive Damping,’’J. Intell. Mater. Syst. Struct., 18:727-742.
4.
Challa, V.R., Prasad, M.G., Shi, Y. and Fisher, F.T.2008. ‘‘A Vibration Energy Harvesting Device with Bidirectional Resonance Frequency Tenability,’’Smart Mater. Struct., 17:015035.
5.
Chong, K.-S., Gwee, B.-H. and Chang, J.S.2005. ‘‘A Micropower Low-voltage Multiplier with Reduced Spurious Switching,’’IEEE Trans. Very Large Scale Integr. (VLSI) Syst., 13: 255-265.
6.
Erturk, A. and Inman, D.J.2008. ‘‘Issues in Mathematical Modeling of Piezoelectric Energy Harvesters,’’Smart Mater. Struct., 17:065016.
7.
Glynne-Jones, P., Beeby, S.P. and White, N.M.2001. ‘‘Towards a Piezoelectric Vibration-powered Microgenerator,’’Sci. Meas. Technol., IEE Proc. , 148:68-72.
8.
Guyomar, D., Badel, A., Lefeuvre, E. and Richard, C.2005. ‘‘Towards Energy Harvesting using Active Materials and Conversion Improvement by Nonlinear Processing,’’IEEE Trans. Ultrason., Ferroelect., Freq. Contr., 52:584-595.
9.
Guyomar, D., Lallart, M. and Monnier, T.2008. ‘‘Stiffness Tuning Using a Low-cost Semi-active Nonlinear Technique,’’ IEEE/ASME Trans. Mech. , 13:604-607.
10.
Guyomar, D., Sebald, G., Pruvost, S., Lallart, M., Khodayari, A. and Richard, C. 2009. ‘‘Energy Harvesting from Ambient Vibrations and Heat,’’J. Intell. Mater. Syst. Struct., 20:609-624.
11.
Hamakawa, Y.2003. ‘‘30 Years Trajectory of a Solar Photovoltaic Research,’’ In: 3rd World Conference on Photovoltaic Energy Conversion, Osaka, Japan.
12.
Keawboonchuay, C. and Engel, T.G.2003. ‘‘Electrical Power Generation Characteristics of Piezoelectric Generator Under Quasi-static and Dynamic Stress Conditions,’’IEEE Trans. Ultrason., Ferroelect., Freq. Contr., 50:1377-1382.
13.
Krikke, J.2005. ‘‘Sunrise for Energy Harvesting Products,’’IEEE Pervasive Comput., 4:4-35.
14.
Lallart, M., Garbuio, L., Petit, L., Richard, C. and Guyomar, D.2008b. ‘‘Double Synchronized Switch Harvesting (DSSH): A New Energy Harvesting Scheme for Efficient Energy Extraction,’’IEEE Trans. Ultrason., Ferroelect., Freq. Contr., 55:2119-2131.
15.
Lallart, M. and Guyomar, D.2008. ‘‘An Optimized Self-powered Switching Circuit for Non-linear Energy Harvesting with Low Voltage Output,’’Smart Mater. Struct., 17:035030.
16.
Lallart, M., Guyomar, D., Jayet, Y., Petit, L., Lefeuvre, E., Monnier, T., Guy, P. and Richard, C.2008a. ‘‘Synchronized Switch Harvesting Applied to Selfpowered Smart Systems : Piezoactive Microgenerators for Autonomous Wireless Receiver,’’ Sens. Actuators A, 147:263-272.
17.
Lefeuvre, E., Badel, A., Richard, C., Petit, L. and Guyomar, D.2006. ‘‘A Comparison Between Several Vibration-powered Piezoelectric Generators for Standalone Systems,’’ Sens. Actuators A, 126:405-416.
18.
Leland, E.S. and Wright, P.K.2006. ‘‘Resonance Tuning of Piezoelectric Vibration Energy Scavenging Generators Using Compressive Axial Preload,’’ Smart Mater. Struct., 15:1413-1420.
19.
Peters, C., Maurath, D., Schock, W., Mezger, F. and Manoli, Y.2009. ‘‘Closed Loop Wide Range Tunable Mechanical Resonator for Energy Harvesting Systems,’’J. Micromech. Microeng., 19:094004.
20.
Priya, S.2005. ‘‘Modeling of Electric Energy Harvesting Using Piezoelectric Windmill,’’ Appl. Phys. Lett., 87:184-101.
21.
Roundy, S., Wright, P.K. and Rabaey, J.2003. ‘‘A Study of Low Level Vibrations as a Power Source for Wireless Sensor Nodes,’’ Comput. Commun. , 26:1131-1144.
22.
Roundy, S. and Zhang, Y.2005. ‘‘Toward Self-tuning Adaptive Vibration-based Microgenerators,’’ In: Proceedings of SPIE Smart Structures, Devices, and Systems II, Vol. 5649, pp. 373-384.
23.
Seok, M., Hanson, S., Lin, Y.-S., Foo, Z., Kim, D., Lee, Y., Liu, N., Sylvester, D. and Blaauw, D.2008. ‘‘The Phoenix Processor: A 30 pW Platform for Sensor Applications,’’ In: 2008 IEEE Symposium on VLSI Circuits, Honolulu, HI, pp. 188-189.
24.
Shearwood, C. and Yates, R.B.1997. ‘‘Development of an Electromagnetic Microgenerator,’’Electronics Lett., 33:1883-1884.
25.
Sodano, H.A., Inman, D.J. and Park, G.2004. ‘‘A Review of Power Harvesting from Vibration using Piezoelectric Materials,’’ Shock and Vib. Digest, 36:197-205.
26.
Vilchcs, A., Fobelets, K., Michelakis, K., Despotopoulos, S., Papavassiliou, C., Hackbanh, T. and Konig, U.2003. ‘‘Monolithic Micropower Amplifier Using SiGe n-MODFET Device,’’Electronics Lett., 39:884-886.
27.
Zhu, D., Roberts, S., Tudor, J. and Beeby, S.2008. ‘‘Closed Loop Frequency Tuning of a Vibration-based Micro Generator,’’Proceedings of PowerMEMS 2008, Sendai, Japan, pp. 229-232.
