27.11.2015 03:30
Wi-Fi, in addition to the Internet, is able to give out more and electricity, say US researchers from the University of Washington, who have made a prototype for wireless charging gadgets from Wi-Fi-router.
The inventors with the new instrument could charge fitness bracelet Jawbone. It is reported that 41% battery charging took almost 2.5 hours. Moreover, this method is absolutely safe for humans, reports Popular Science writes.
It is noted that the gadget was at a distance of 8.5 m from the source. Also, the authors of the project have been able to charge the camera module is the energy required to perform the snapshot. Using Wi-Fi, the researchers were able with the help of supercapacitors connected with a small camera, located 8 meters away from the router; every 35 minutes to collect enough energy to take a picture.
Scientists emphasize that the advantage of this technology is that the gadget to charge and Wi-Fi access network will be simultaneously. According to them, this technology is currently capable to charge devices with low energy consumption, such as fitness braslety.Vazhnoy part is that charging is possible only if the mobile device is put into a special case, the technical characteristics of which is no known.
« Even today, there is a great Wi-Fi-infrastructure. If we can convert it to energy distribution, it allows you to use a wireless Energy in homes and offices », – said one of the researchers.
This technology is not new. Companies such as young Energous from California y; s announced the market launch in 2016. The Wi-Fi-charging for smartphones. True Energous technology allows you to transfer energy wirelessly over a distance of up to 4.7 meters.
Most of the news about the new methods of wireless transmission of energy are inextricably linked with the familiar little phenomenon of magnetic resonance, which uses two coils tuned to a certain frequency. The supply of electricity to one of them induces the creation of a resonant electromagnetic field in the other, which in turn provides a relatively efficient power transfer by air. The same method is used in resonant dipole coil system (DCRS). However, engineers Energous chose a slightly different approach.
According to Technology Review, the method provides for the involvement Energous array of small antennas that send radio waves nearest mobile devices identified using Bluetooth. Until about the technology and how it works we know very little. In the above video you can see how the system Energous Energy Router transmits power two devices. We can assume that in this case we are talking about a certain species beamforming (Beamforming). It is reported that transmission efficiency rather modest – about 20%, but for mobile devices with low power consumption is quite acceptable.
An important detail is that charging is possible only if we put the mobile device in a special case , on the technical characteristics of which nothing is known.
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