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Piezoelectric MEMS boosts vibration harvester

4/28/2011 05:19 AM EDT
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krisi
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re: Piezoelectric MEMS boosts vibration harvester
krisi   5/2/2011 8:18:36 PM
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I don't see that technology being used in human body implants, too dangarous...but some wireless sensors networks could take advantages of this...very interesting, Kris

green_is_now
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re: Piezoelectric MEMS boosts vibration harvester
green_is_now   5/12/2011 5:03:47 PM
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most aplications will have a well defined vibration frequency but many will not. Why not design the mems so that the respond to a broader range of frequencie so as to have higher probability of energy being in the pass band of the converter? Thus harmonics and/or subharmonic frequency components along with the fundametals would most alway fall into the passband. How do garentee orentaition? Are the mems designed to except vibration in any direction or do they need to be "inplane"? That is are the MEMS 3D?

green_is_now
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re: Piezoelectric MEMS boosts vibration harvester
green_is_now   5/12/2011 5:06:38 PM
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IR losses stop this size reduction, also the step up ratio needs the wire length. But it could be broken up into smaller components for highth reduction for example at the cost of adding extra componnets

green_is_now
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re: Piezoelectric MEMS boosts vibration harvester
green_is_now   5/12/2011 5:09:30 PM
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yes just broadcast the energy amplitude and frequency or monitor on sensor, anyway this signal alone could trigger a physical inspection of the bridge as it could be monitored for changes to its steady state over time.

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