energy harvesting via PVDF - (02)

krugar at krugar.info krugar at krugar.info
Fri Dec 20 08:29:19 PST 2013


you'd need an awefully large piezo sheet/drumskin to resonate at 8Hz, and i'm guessing the energy of that ambient infrasound rumble you try to tap into is so low that in most settings you'd be a lot better off by just using a solar panel of the same size.


brian carroll <electromagnetize at gmail.com> wrote:
>okay, so the big surprise for me was that this piezo film
>technology lines up directly with an energy harvesting
>article from a recent (urls) list. excerpted again below:
>---------------------------------------------------------------------------
>
>// contact electrification using patterned nanomaterials...
>// note: the gap, equilbrium via chargeflow, as if via entropy.
>// discovery originating from malfunctioning piezo-sensor...
>
>Capturing wasted electricity with triboelectric generators
>http://phys.org/news/2013-12-capturing-electricity-triboelectric.html
>
>[quote] "Beyond generating power, the technology could also provide a
>new type of self-powered sensor, allowing detection of vibrations,
>motion, water leaks, explosions – or even rain falling." ... "They
>have learned to increase the {power output density by a factor of
>100,000} by applying micron-scale patterns to the polymer sheets. The
>patterning effectively increases the contact area and thereby
>increases the effectiveness of the charge transfer." [unquote]
>
>---------------------------------------------------------------------------
>
>from what i have read about PVDF, it would seem possible
>that a similar nanopatterning could be etched onto the piezo
>film surface that is bending or strained, and via this more
>intense grid or array it may be possible to likewise up the
>capacitance or charge that can be held and stored within
>piezo film, (patterns like a step-up-transformer perhaps),
>based on the above, if indeed a non-piezo film investigation.
>
>the characteristics appear identical: LEDs need enough
>voltage to light, and a constant current to maintain lit, and
>thus the high voltage of material difference or 'gap' in the
>original news story (linked above) indicates that a high
>voltage is _momentarily transferred that is enough to
>light up an array of LEDs, though only for an instant.
>and this becomes an application for energy harvesting.
>
>so it should be notable if the PVDF film also shares these
>properties, that it generates a high voltage that can be sent
>into a circuit, though likewise it is a momentary not constant
>charge and thus particular circuits would need to be designed
>to allow it to function as a source of energy for a self-sustaining
>circuit (energy harvesting) rather than just pushing out current,
>unless somehow it was possible to get it moving in that way...
>
>i.e. constant vibration -> high voltage -> constant AC current
>
>(these observations from someone who knows nothing about
>these things, beyond trying to understand the fundamentals
>of basic electronics components and their functioning. yet
>enough to ask questions and make a few assumptions...)
>
>so it appears to be an issue of a trickle-charge circuit, that
>the PVDF film would vibrate and offload that current into a
>another capacitor where it could be stored until a usable
>amount and then accessed for low-power functionality of
>some super-efficient circuit design, PVDF the powersource.
>
>so for this trickle charge circuit, it is imagined:
>
>  PVDF film --> diode --> supercapacitor --> "circuit"
>
>whereby 'vibrational energy' is powering the overall circuit,
>which in crypto or security terms could be sensing-related
>or monitoring or sniffing data via low-power and stealth, etc.
>or perhaps even transmitting information or code or relaying
>or capturing infrasound data, where vibration both provides
>power to the circuit and information (high metaphysics)
>
>from what i have read, the current is AC from the piezo film,
>and then another capacitor would turn it into DC if this is not
>mistaken, for use in such a circuit- this only an approximation
>of what the most basic issues might involve, if also incorrect
>though i figure many here have the information and knowledge
>to resolve such issues if inquiring further, thus; 'about ideas'
>
>
>so at this stage, as with everything: things start to get weird...
>
>perhaps it is because of my lack of knowledge or involves some
>basic misunderstanding that i am simply incapable of realizing;
>though this little electronic component is essentially some kind
>of strange antenna device, and if it can be made to vibrate then
>it generates power; so if it constantly vibrates, it constantly is
>able to generate current and thus replaces a battery in a circuit
>
>so to get usable current, the key is to either trickle charge and
>build up and store energy over time, to a point that it can be
>used at normal levels, or to generate a frenzy of energy via
>constant activity that strains the PVDF film, creating a flow
>of alternating current that can be immediately turned to DC
>as powersource, and thus 'live power' vs. a delayed approach
>
>(maybe oversimplifying or confusing the electronics issues
>or paradigms involved, though this is how i am relating to it)
>
>why does it matter?
>
>well, from what i understand after listening to my friend who
>is a composer, making a film on a Nikola Tesla, whose studies
>and research focuses on 'music as an energy system', [0] [1]
>also in relation to my own investigations of logic (A=A) as this
>relates to her study of tuning systems and "resonance-based
>energy transfer" (somewhat in the range of wireless power, yet
>non-electromagnetic, involving vibrations, not moving of charge)-
>
>if there were a vibration that existed that could be tapped into
>by this PVDF piezo film -as antenna- and it could be made to
>vibrate constantly, then *bingo* -- it is access to free-energy
>
>and i am only thinking these specific thoughts because of hh,
>and would be nowhere in this vicinity with my own investigations
>which tend more towards the HIOX model though interest of this
>realm of electronics is extreme at the same time as my illiteracy
>and incapacity, thus words must substitute for actual experiment.
>
>and so piecing it together- under such guidance, it is verified by
>others who are expert that this constant vibration exists within
>the environment already, today, now, and for billions of years
>presumably. it was investigated by Nikola Tesla, where the
>area between the ground of earth and the dome of sky in its
>upper atmosphere create a waveguide or sorts, known as
>the "Earth-ionosphere cavity" [2], which in turn generates a
>vibrational frequency known as the Schumann Resonance [3]
>that provides a source of constant vibration at 7.83 Hz resulting
>from lightning strikes in the atmosphere which then creates this
>giant battery in the sky, that in turn could be tapped into, both
>in non-electromagnetic terms, via vibration, and likely as with
>lightning, electromagnetic terms, as a source of power.
>
>so it cannot be this easy, right. gotta be missing something.
>and if i could design the circuit and figure it, i would know, and
>yet i cannot and so share my puzzlement, inquiring: why not?
>what am i missing, what do i fail to understand of the situation?
>
>
>in other words, if you can get the PVDF film vibrating by tuning
>into the 7.83 Hz frequency of the Schumann Resonance, you
>would have access a local instance of perpetual motion, as long
>as the dynamics retain the existing characteristics, indefinitely
>
>continued...
>
>
>0. helen hall - composer, filmmaker
>http://www.helenhall.net
>
>1. Pictures of Infinity -- film about Tesla & aether
>http://picturesofinfinity.net/
>
>2. Earth-ionosphere cavity (diagrams)
>http://www.glcoherence.org/templates/gcp/images/monitoring_system/earth_rhythms/diagram_schumann_resonances_ionosphere_cavity.jpg
>http://www.vlf.it/Schumann/cavity.gif
>
>3. Schumann resonances
>http://en.wikipedia.org/wiki/Schumann_resonances
>
>
>oratorio, amaryllis, Teller

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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