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Rob Spiegel
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Clever energy harvester
Rob Spiegel   7/23/2013 8:18:21 AM
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I like this Elizabeth. Here's a very good real-world application for environmental energy harvesting. This is a great solution to the problem of providing a power source for tire pressure sensors.

Elizabeth M
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Re: Clever energy harvester
Elizabeth M   7/24/2013 9:29:40 AM
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Yes, I thought it was clever, too, Rob. I think this is the way forward and a lot of researchers are thinking this way--to use vibrations and other movements or even sounds or heat from vehicle parts to power sensors on the vehicle itself. There is also work to do something similar with thermal energy on airplanes.

Rob Spiegel
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Re: Clever energy harvester
Rob Spiegel   7/24/2013 11:41:16 AM
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Given the developments in energy harvesting solutions, I take it that reliability is not an issue. I would also guess from these developments that using the energy that drives the other devices on the car is not an option here.

Nancy Golden
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Re: Clever energy harvester
Nancy Golden   7/24/2013 12:08:39 PM
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@Rob: But perhaps this energy could be diverted towards some of those other devices?

Charles Murray
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Great idea
Charles Murray   7/23/2013 4:45:23 PM
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This is a perfect application for energy harvesting. With it, the vehicle uses no onboard energy source to power the TPM system, other than the tires themselves. Another great energy harvesting story, Liz.

Nancy Golden
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Re: Great idea
Nancy Golden   7/23/2013 6:49:44 PM
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I like this! Simple and economical using already known technology that does not require an additional power source...and adds to vehicle safety. Can't get much better than this!

NadineJ
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Re: Great idea
NadineJ   7/23/2013 10:51:40 PM
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I agree.  This is really cool.  What else can this be applied to?  Heart monitors for runners?

Nancy Golden
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Re: Great idea
Nancy Golden   7/23/2013 11:20:34 PM
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I had to laugh when I first read your post Nadine because I went bike riding this evening and  kept at a pretty good pace, so my first thought was that my rapid heart beat could have provided the mechanical energy for a heart monitor but then I realized you meant the vibration caused by the impact/motion  of the runner's feet going up and down with impact.

NadineJ
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Re: Great idea
NadineJ   7/24/2013 11:02:19 AM
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Safety lights for bicycles!  Thanks for sparking that idea Nancy.

Elizabeth M
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Re: Great idea
Elizabeth M   7/25/2013 6:07:18 AM
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Great idea, Nadine! It seems like a no-brainer, as they really don't take up so much power.

NadineJ
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Re: Great idea
NadineJ   7/26/2013 12:17:56 AM
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Speaking of safety lights...I just saw an article yesterday in the Int'l Herald Tribune about new safety lights on bikes.  Click here to read it.

I really like the lasers.  They look cool and make you much more visible!

Elizabeth M
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Re: Great idea
Elizabeth M   7/25/2013 6:12:38 AM
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Your story inspired a new energy-harvesting design, Nancy! I think both ideas--your heartbeat and the impact of your feet--could work, though. And in fact, they are working, as one company called SolePower has made energy-harvesting insoles, and another called Pavagen has made tiles that harvest energy when you step on them. There are also pacemakers that are harvesting energy from the human heartbeat for power. So your instincts are dead on. :)

Nancy Golden
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Re: Great idea
Nancy Golden   7/25/2013 10:55:52 AM
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That is amazing, Elizabeth. I found an article that explains the concept here:


http://www.energyharvestingjournal.com/articles/heartbeat-power-runs-pacemaker-00004877.asp

Charles Murray
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Re: Great idea
Charles Murray   7/31/2013 6:47:22 PM
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Thanks for that link, Nancy. Every time I've read one of Liz's articles, I've wondered about using energy harvesting to power a pacemaker or implantable defibrillator. But I never considered that the heart itself would provide the current. Great link.

Elizabeth M
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Re: Great idea
Elizabeth M   7/24/2013 9:38:00 AM
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That's a good idea, Nadine. There is actually a lot of research right now to have devices power themselves through vibration or other methods. I've done some stories about harvesters on airplanes that use thermal energy to power sensors...and also energy harvesters on shock absorbers on cars that use vibration. I think there are a lot of applications for this. Maybe our readers can think of others.

Ann R. Thryft
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Re: Great idea
Ann R. Thryft   7/24/2013 11:56:57 AM
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I agree--great energy harvesting idea.

Elizabeth M
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Re: Great idea
Elizabeth M   7/24/2013 9:40:53 AM
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Thanks, Chuck. I'm sure I will have more energy harvesting stories in the future! But you're right, sensors on vehicles are a great application of this. It's kind of a no brainer, and I expect we'll see more of this type of thing in the future.

Charles Murray
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Re: Great idea
Charles Murray   7/26/2013 5:53:31 PM
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Given the power stinginess of some of the new breed of microcontrollers, I would think many MCUs will soon be driven by energy harvesting systems, if they aren't already.

Elizabeth M
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Re: Great idea
Elizabeth M   7/30/2013 6:42:55 AM
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That definitely seems to be the direction this technology is heading, Chuck. It doesn't seem to make sense to try to power MCUs any other way now, especially with the deman for ultra-low-power electronics.

AnandY
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Gold
Re- Great idea
AnandY   7/26/2013 5:55:50 AM
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Going by the confidence that Panasonic and Imec are portraying in regard to their new development, it would only be right to assume that the effectiveness of the energy harvested matches the other mainstream sources of energy or even surpasses them. It would be a great disappointment to raise the hopes of car developers before a great backlash.

Elizabeth M
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Blogger
Re: Re- Great idea
Elizabeth M   8/1/2013 8:19:00 AM
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I would agree with you on this, AandY, and I think energy harvesting is becoming so sophisticated that it will replace batteries someday in a lot of devices. Or at least I hope so!

William K.
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Platinum
Tire vibration energy harvester
William K.   7/30/2013 6:05:38 PM
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While I agree that tires are a noisy environment I also question the assertions about "shocks" in the tire rotation. There is a flexing motion but that does not fit the normal descriptio  for a shock wave. In addition I have a concern about the lifespan of anything attached to the tire's inside surface. While it would be a good location for capturing flexural motion it would also be subject to damage from the tire installation and removal operations. But the concept of powering a tire pressure monitor from vehicle motion is a very good idea. The challenge will be the effort of making sure that the receiver on the vehicle is able to communicate with the tires correctly.

dbell5
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Platinum
Automotive energy harvesting
dbell5   7/30/2013 7:20:15 PM
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Since shock absorbers were mentioned, I've long thought that there lies an ideal, essentially free, source of recovered energy. Because the very purpose of them is to convert mechanical energy into another form - generally heat - as a means of damping motion, it seems a no-brainer.

With current power management and conversion devices, controlled transformation of suspension motion into electrical energy is looking feasible.

Elizabeth M
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Re: Automotive energy harvesting
Elizabeth M   7/31/2013 6:55:33 AM
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Forgive me if I'm repeating myself, dbell5, but did you see this article I wrote: http://www.designnews.com/author.asp?section_id=1386&doc_id=264515


That's the one about the energy-harvesting shock absorbers. Maybe I posted it already in a comment, if shock absorbers already were mentioned, but I am not sure. In any case, you are right that this seems a great place for energy harvesting.

dbell5
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Platinum
Re: Automotive energy harvesting
dbell5   7/31/2013 10:29:02 AM
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Thanks, Elizabeth - I had not seen that!

 

Yet another great idea, scooped...

 

Dave



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