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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.

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 5:03:47 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?

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

prabhakar_deosthali
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re: Piezoelectric MEMS boosts vibration harvester
prabhakar_deosthali   4/29/2011 6:12:23 AM
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Yes! especially for earthquake-prone zones , the structural integrity can be monitored using a mesh of such sensors embedded into the structure.

kdboyce
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re: Piezoelectric MEMS boosts vibration harvester
kdboyce   4/29/2011 5:43:09 AM
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Rule to live by...Don't get sick, and apparently don't be near anyone that is if they have that technology implanted. Like all technologies, they can be used for good or evil and unfortunately the scale tends to tip towards evil far more today than ever before.

DrQuine
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re: Piezoelectric MEMS boosts vibration harvester
DrQuine   4/28/2011 11:45:03 PM
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This technology might also be a good way to power embedded structural integrity sensors in bridges or other systems which are difficult to access. Certainly vibration is available....

Bob Lacovara
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re: Piezoelectric MEMS boosts vibration harvester
Bob Lacovara   4/28/2011 8:23:27 PM
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Note that a vibration sensor is a form of microphone. Note that in medical applications, we now face a future in which microphones are implanted into us. Note that the device can report wirelessly. Note the funding source, DARPA. Read the article on MondoNet (go to the home page for it) being developed as a distributed, wireless access fabric that will cover the world. (Note that the developers are concerned with "privacy".) So, let's see: everywhere you go, the government will be able to hear you. O brave new world!

Sanjib.A
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re: Piezoelectric MEMS boosts vibration harvester
Sanjib.A   4/28/2011 5:39:27 PM
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What kind of industrial process control application ideas are in your mind?...remote sensing realated?

wilber_xbox
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re: Piezoelectric MEMS boosts vibration harvester
wilber_xbox   4/28/2011 5:13:18 PM
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Is there any limitation to increasing its vibration range? Why only 14-155Hz vibrations? I guess that having the broader vibration range can have other usages.

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