36 research outputs found
Complex finite element analysis applied to photothermal and thermoelastic microscopies
Experimental validation of an impact off-resonance energy harvester
Most piezoelectric energy harvesting research has focused on developing on-resonance harvesters that work at low frequencies, even though higher frequencies can generate more power. In addition, conventional resonant harvesters have low efficiency when the excitation frequency is away from resonance. Using mechanical impacts has the potential to improve the overall harvested energy since high frequencies are excited during impacts. Also, the presence of impacts reduces the influence of the base excitation frequency and the requirement to exactly match the resonance frequency. To take advantage of the higher frequency response, an impact energy harvester is designed and validated experimentally. The harvester consists of a cantilever beam with a piezoelectric patch attached to its base which impacts with a stiff object. The harvester is modelled using finite element analysis and a Hertzian contact law. The model is tested and validated in the laboratory using an in-house manufactured demonstrator. Good agreement with the experimental data is obtained, setting the basis for future optimisation of the harvester geometry and piezoelectric properties
Thermal and thermoelastic dynamic analysis with Finite Element Analysis, Application to photothermal and thermoelastic microscopies », XVIII EUROSENSORS, Rome, Italy, september 12-15, 2004,
International audienc
Application des méthodes opto-thermiques à la caractérisation et au marquage des matériaux
Energy Storage Capacity of Vibrating Structure: application to a Shock System », Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS (DTIP 2005), Montreux, Switzerland.
International audienc
Qualité d'un micro-convertisseur mécano-électrique en vue d'une application de récupération d'énergie
Antiretroviral treatment can be successfull within a prison setting: The experience from Bangkwang Central Prison, Thailand.
2006 AIDS Conference, Toront
âPiezoelectric micro-machined ultrasonic transducer (pMUT) for energy harvestingâ, Symposium, Rotterdam,
International audienc