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«Niente batterie, niente cavi, nessun limite». E se la casa diventasse wireless?
«Niente batterie, niente cavi, nessun limite». È lo slogan di EnOcean Alliance, consorzio che riunisce più di 250 società impegnate nello sviluppo e nella promozione di sistemi wireless e autoalimentati per il controllo dei dispositivi domestici, la misurazione dell’energia utilizzata e i relativi costi, in ambito residenziale e commerciale. Insomma: dispositivi senza fili e in grado di funzionare grazie al solo “energy harvesting”, ossia il processo per cui l’energia è ricavata direttamente dall’ambiente circostante (movimento, luci, differenze di temperatura), che aprono nuove e inedite opportunità per il controllo e il monitoraggio degli edifici dai punti di vista ambientale, progettuale e della qualità dell’esperienza abitativa. Per conoscere da vicino queste tecnologie l’appuntamento è a Expocomfort (27-30 marzo, Fiera di Milano a Rho) dove il consorzio presenterà alcune soluzioni.
Wireless electricity - where the magic happens
I recently read a very interesting article on wireless electricity.
So what is so special about wireless electricity? It allows electronic devices to be recharged without the need for cables and even with obstackls in the way.
Here is a bit of a science lesson…
“The big breakthrough in wireless power came in 2007 in an experiment at MIT. Based on wireless resonant coupling it involves using a magnetic field to induce a low charge over a short distance - just a few millimetres.
Here is an explantion from the witricty. com website
Resonant Magnetic Coupling: Magnetic coupling occurs when two objects exchange energy through their varying or oscillating magnetic fields. Resonant coupling occurs when the natural frequencies of the two objects are approximately the same.
Two idealized resonant magnetic coils, shown in yellow. The blue and red color bands illustrate their magnetic fields. The coupling of their respective magnetic fields is indicated by the connection of the colorbands.”
This technology is already in use for recharging gaming controllers and some mobile phones. The QI consortium was formed in 2008 to allow for a standardisation of the technology for mobile phones and other devices. So expect to see more universal charging pads in the future. Panasonic has developed a solar charging table that combine energy harvesting with QI wireless charging.
Powercast, an US company, has developed receivers that convert radio waves into DC power. These can be used in numerous automation items including occupancy and motion sensors, door locks, and access control card readers, all without the need for wires.
Laser Charging is another form of wireless electricity with the potential to power devices over a greater distance. Here is a short description of how it works from Powerbeam’s website:
At one end, electricity is turned into optical energy. That energy is then pointed at a receiver and turned back into electricity. Whatever device is attached to the receiver is power without any wires!
Check out their cool video demo.
Lasermotive is another company currently developing the laser technology. Having already won a major prize at NASA, Lasermotive is looking at powering things such as remote towers on hilltops, flying drones and more.
Wireless power is set to changes our lives as much as the invention of electricity did.