Thursday, March 16, 2017

TECH SPECIAL....... Soon, you can power your personal space wirelessly

Soon, you can power your personal space wirelessly



The caveat: Your room has to be purpose-built for ubiquitous wireless power transfer

Free -roaming wireless power has been the dream of engineers since the days of Tesla and Edison waging their war of innovation but a number of technical hurdles have prevented it from becoming a reality. The folks at Disney Research have revealed that they have successfully built a method to provide full coverage of an average room and power all the devices one might need.

In a paper published in the journal Plos One, the researchers describe their methodology for delivering around 1900 watts of energy around a room with an efficiency of 40 to 95 per cent depending on the position.

Describing how this works starts with the worst drawback of the system. The room needs to be specially built to provide the wireless power. That means the walls are made of alumini um panels and there's a big, ugly copper pipe smack in the middle going from floorto-ceiling.

In the middle of the pole, a section has been removed and 15 capacitors have been installed. This sets the resonant frequency and isolates electric fields that are being fed into the room from a signal generator outputting a tone at 1.32 MHz.

Once the system fires up, the room is blanketed in a magnetic field and a receiving coil that's tuned to resonate at the same frequency powers the devices in the room.

That 1900 watts of power we mentioned falls within federal guidelines for specific absorption rate (SAR), which is a measure of the energy a human body can absorb before it becomes dangerous. The thing is, the devices in the room need to be using that energy or it could become a hazard. Also, people shouldn't stand closer than 46 centimetres to the pole. Those problems could be resolved with a more reactive system and some interior design.

What's important is a viable system has been tapped that could become as ubiquitous as WiFi once the kinks are worked out.No more cord bundles cluttering up the room and no more worrying about a dead phone .


gizmodo.in

No comments: