[NewCandle] AdaptivEnergy Module

[Keith Nagel]

Hi John,

The graph came though fine.

I think the kit includes a lot of stuff we wouldn't need,
hence the steep pricetag. Can we get just the power module?

A functioning device is going to require holding off a large
static tension from the tensed wire. Perhaps your contact
can help with respect to that. How would a static tension
affect the output of the device?

I will leave it to Horace and Nick if they want to build up
a capacitive driver, and the Piezo to you, but I would be willing to try a
magnetic
one. It fits in enough with my current work that I can piggy
back the project on without too much trouble. There is no
reason a capacitive driver can't be made to work, but I
fear that the technical details will prove the design difficult
to work with, and were I given a choice between the two ( cap + piezo ) I
would start with the Piezo. It's just too hard to achieve large capacitive
changes for small displacements, as I'm sure nick has found
with his various experiments. For what it is worth, Nick,
I've had very good results building parametric oscillators
with varactor diodes. You might consider them in lieu of
your mechanical variable caps. Also, you might consider
tapping the alternating waves rather than the DC field mill
type circuits you have been working with.

K.

-----Original Message-----
From: newcandle-bounces at ipdiscover.com
[mailto:newcandle-bounces at ipdiscover.com]On Behalf Of John Steck
Sent: Thursday, October 23, 2008 5:57 AM
To: List NewCandle
Subject: [NewCandle] AdaptivEnergy Module


Not sure if the graph attached to this email will make it through the
NewCandle rebroadcast, but thought I would give it a try.  In brief, the
output function for this device is reported to be:

y= 0.6015x^2 + 11.571x

y= Power (mW)
x= Acceleration (g)

-j




From: McKee, Richard
Sent: Thursday, October 23, 2008 7:17 AM
To: John Steck
Subject: FW: FW: Data AdaptivEnergy




John,

The kits are $699.00
Please see the link below and here is more information about our technology.
The beam is 60Hz in the demo kit but can be customized based on frequency
data. If you are open we can discuss your potential applications.

This is the power output versus acceleration for our latest EH beam.  This
is the beam that will be in the development kits.The power output of a
piezoelectric energy harvesting beam increases quadratically with
acceleration.  This is shown in the plot by the excellent curve fit to the
data.  The equation for the trendline can be used to interpolate to power
output between data points.  As you can see the power output follows a nice
quadratic trend to zero at low Gs.  For example, the power output at 0.1 G
is 1.2 mW and at 0.05 G is 0.58 mW.  0.05 G is an extremely small vibration
amplitude.  This would be barely perceptible to human touch (The threshold
of human vibration perception is 10 mG's at 100 Hz).  We have wireless
sensing demo setup now that will transmit data every 16 seconds with a 40 mG
input at 60 Hz.


http://www.sensorsmag.com/sensors/Feature+Articles/Energy-HarvestingmdashThe
-Next-Evolution-for-Wirel/ArticleStandard/Article/detail/553767?ref=25

https://community.ti.com/blogs/microcontrollers/archive/2008/08/18/TI-discus
ses-energy-harvesting_2C00_-an-emerging-power-technology_2C00_-and-its-diver
se-applications.aspx?DCMP=MSP430&HQS=Other+PR+energyharvesting




Richard McKee
Sales Manager
AdaptivEnergy LLC
(757) 320-1525
rmckee at RLPenergy.com
www.RLPenergy.com