There seems to be some confusion on this thread between magnetic resonance, which is the type of power transfer used by WiTricity and others, and radiative RF which is the radio technology we are used to. For example, received power does not fall off with the square of distance in the case of magnetic resonant systems. There are definitely a ton of challenges to this technology, but it is good to keep in mind that they are NOT talking about transmitting a high power RF signal and having it received at range. Here is a link to a paper that describes both types of systems so you can understand the implementation and trade-offs. The author's have achieved 80% efficiency over a few meters using magnetic resonance.
Experimental Results with two Wireless Power Transfer Systems
http://sensor.cs.washington.edu/pubs/WISP-WARP.pdf
Video and other good info:
http://www.alansonsample.com/research/wrel.html
I think it is important to be accurate with with our language. IT is not CS. The terms are related, not interchangeable. A graduate of Devry does serve the same function as a graduate of MIT. Sometimes it is useful to talk about fruit, and sometimes we need to differentiate between apples and oranges in order to have an intelligent conversation.
Imagine, the lunatic is only meters away, stalking with that slow step of all maniacal zombies, you dash to your car, fumble with the key; finally you manage to find the ignition, turn the key, BUT THE CAR WON'T START! Quick, the breathalyzer, THE BREATHALYZER!
Isn't 50 billion yen much closer to say... 4 billion US dollars? (not 400 billion) So the exchange rate is say... 110 Yen to $1. When you are talking billions, it's a lot of money regardless. But even if the numbers are big, the zeros still matter.
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They are actually using the technology to power pacemakers. http://www.alansonsample.com/publications/docs/2012%20-%20ProcIEEE%20-%20Powering%20a%20Ventricular%20Assist%20Device%20with%20FREE-D.pdf
The referenced paper actually describes two systems based on RF power transfer. Here is one on magnetic resonance: http://www.alansonsample.com/publications/docs/2010%20-%20TIE%20-%20Magnetically%20Coupled%20Resonators%20for%20Wireless%20Power%20Transfer.pdf
There seems to be some confusion on this thread between magnetic resonance, which is the type of power transfer used by WiTricity and others, and radiative RF which is the radio technology we are used to. For example, received power does not fall off with the square of distance in the case of magnetic resonant systems. There are definitely a ton of challenges to this technology, but it is good to keep in mind that they are NOT talking about transmitting a high power RF signal and having it received at range. Here is a link to a paper that describes both types of systems so you can understand the implementation and trade-offs. The author's have achieved 80% efficiency over a few meters using magnetic resonance. Experimental Results with two Wireless Power Transfer Systems http://sensor.cs.washington.edu/pubs/WISP-WARP.pdf Video and other good info: http://www.alansonsample.com/research/wrel.html
I think it is important to be accurate with with our language. IT is not CS. The terms are related, not interchangeable. A graduate of Devry does serve the same function as a graduate of MIT. Sometimes it is useful to talk about fruit, and sometimes we need to differentiate between apples and oranges in order to have an intelligent conversation.
Imagine, the lunatic is only meters away, stalking with that slow step of all maniacal zombies, you dash to your car, fumble with the key; finally you manage to find the ignition, turn the key, BUT THE CAR WON'T START! Quick, the breathalyzer, THE BREATHALYZER!
Isn't 50 billion yen much closer to say... 4 billion US dollars? (not 400 billion) So the exchange rate is say... 110 Yen to $1. When you are talking billions, it's a lot of money regardless. But even if the numbers are big, the zeros still matter.