Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

WiFi that provides connectivity and charges your gadgets may be closer than you think

RATE THIS! +23
Posted in Science on 7th Jun, 2015 09:00 PM by AlexMuller

A team at the University of Washington, has developed what it’s calling a 'power over Wi-Fi' system that can recharge batteries through the air, from up to 28 feet away. The system comprises just two components; an access point (a router), and custom-built sensors.

 

“The goal of the sensors is to harvest RF (radio frequency) power and convert it into DC power,” explains Vamsi Talla, a researcher on the project. “The second piece, the access point, there we actually developed a custom solution on it, just a software modification that would enable the access point to act both as a good power delivery source and, simultaneously, also as a good Wi-Fi router.” In other words, it achieves power over Wi-Fi in a way that both works with pre-existing hardware, and doesn’t interfere with your Internet connection one bit.

 
Those are two important distinctions. Energous already sells a device that transmits power through the air through RF signals. It requires entirely new, dedicated hardware, though, and loses the Wi-Fi aspect. The UW research, meanwhile, can coexist with traditional Wi-Fi routers, pushing both data and energy simultaneously. Or, more accurately, efficiently harnessing the energy that your router already puts out.
 
As for Wi-Fi interference, there’s a hard cap on how much output of any kind your router can manage at once, sort of like how putting more ketchup on a hot dog leaves less room for mustard. But the UW team came up with a clever workaround to make sure neither charging nor connectivity goes sideways.
 
“If we wanted to just blast as much power as we possibly can, that would kill your Wi-Fi, because you’d have power on the channel all the time,” explains Bryce Kellogg, another researcher on the project. “We optimized the router so that we can deliver what seems like, to the sensor, constant power without impacting your Wi-Fi too much. Instead of having continuous power on one of your Wi-Fi channels, we split it among your three non-overlapping Wi-Fi channels. That allows us to deliver about the same amount of power without impacting any one channel very much.”
 
The team has already tested this out with temperature sensors, a camera, and rechargeable batteries, powering all from ranges of 20 feet, 17 feet, and 28 feet, respectively. If those applications seem a little small-fry, don’t blame them. Blame the FCC, which has imposed a one-watt limit on router power output, for reasons that are mysterious to Talla and company. Should those restrictions loosen, you could start to see far more robust applications.

Tags: WiFiwireless powergadgetbatteryenergyresearchhardware

Read original article » Back to category

Comments

Author: Guest
Posted: 2015-06-08
+1
One big limitations of mobile/smart devices is that battery power is inadequate - it does not last very long in many cases. Solving this problem is important and here we have an interesting solution.... Reply


 

Recent headlines

  • Posted in Business on 2017-10-19 01:17:17
    Bots are transforming personal banking around the world..read more
    Posted in Business on 2017-10-19 01:12:16
    Hardware isn’t enough, content is key to mainstream VR.....read more
    Posted in Hardware on 2017-10-18 00:24:23
    Puerto Rico hurricane shows islands must have renewable.....read more
    Posted in Science on 2017-10-18 00:13:22
    China is betting big on AI..read more
    Posted in Online on 2017-10-18 00:02:28
    Has your browser been hijacked to mine cryptocurrency?..read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Scientists probe Neptune's depths to reveal secrets of icy.....read more
    Posted by AlexMuller
    New terahertz imaging approach could speed up skin cancer.....read more
    Posted by AlexMuller
    Rebutting the claim that antidepressants do not work..read more
    Posted by AlexMuller
    Artificial neural networks decode brain activity during.....read more
    Posted by AlexMuller
    Four Earth-sized planets detected orbiting the nearest.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me