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In our world, when we are surrounded by wires everywhere in the office, at home, with friends, wireless charging is a salvation. With multiple devices at your disposal, I bet you have at least two chargers next to your bed. I'm right? It is because of this that many smartphones on the market have wireless charging capabilities using the Qi standard. Today, Ossia Inc...
In our world, when we are surrounded by wires everywhere in the office, at home, with friends, wireless charging is a salvation. With multiple devices at your disposal, I bet you have at least two chargers next to your bed. I'm right?
It is because of this that many smartphones on the market have wireless charging capabilities using the Qi standard. Today, Ossia Inc has made another breakthrough; according to company representatives, all devices that have Bluetooth or Wi-Fi can be charged wirelessly.
Unlike existing wireless charging standards, which operate over a very short distance, Ossi Inc's development, called Cota, allows devices to be charged at a distance of up to 30 meters. This technology uses Wi-Fi signals and Bluetooth waves as “wires” through which charge is transmitted. In addition, Cota Ossia uses for this purpose already existing antennas that are installed in the devices. Based on this, manufacturers will not need to change anything. All that is required is the installation of a special chip that converts the signal.
As one might expect, with the advent new technology wireless charging, new ones have appeared charging device and the so-called “receivers”. Tiny IC receivers can be installed either on the smartphone or tablet board itself, or in the battery itself. Once the Cota Ossia charger detects this chip within its range of action, it will “send” thousands of signals to the receiver, which the chip will convert and thus the device’s battery will receive the charge it needs. If you are afraid of any radiation, then according to representatives of Ossia Inc., their charger emits a signal no more than mobile phone during a conversation.
Next generation wireless charging: Ossia Cota
Based on this, such chargers can be installed anywhere: in the home, office, cafe and even on outdoors. So, with this wireless charging technology, you can charge your devices without even knowing it. It is worth noting that this technology can recharge not only smartphones and tablets, but also other household appliances. At least that’s what the manufacturer’s company representatives said.
On this moment, Ossia Inc. intends to enter into contracts with various manufacturers How mobile devices, so household appliances. Considering that smartphones nowadays are increasingly living “next to the socket”, then this technology could really be a breakthrough in this area.
“Until now, a large number of works on the study of metamaterials have been purely theoretical. We have shown that a little practice will help these materials become useful for general use,” the developers say modestly.
Metamaterials are essentially compositional, the properties of which are determined not so much by the properties of the constituent elements, but by an artificially created periodic structure.
Metamaterials are synthesized by introducing into the original natural material various periodic structures with a variety of geometric shapes, which modify the dielectric and magnetic susceptibility of the original material.
Charging from mains or USB, traditional and portable batteries - all this may soon become history. Helping you forget these anachronisms are two engineering students, Allen Hawkes and Alexander Katko, from the Duke University School of Engineering, with the help of Professor Steven Cummer.
Using metamaterials, they developed a device that picks up the signal wireless internet and converts it to . According to the developers, the efficiency of this “energy collector” is higher than with wired charging, and the output parameters are very close to.
The device converts microwave Wi-Fi signal into D.C., suitable for directly charging the battery of a mobile phone or any other portable device. The key to this technology is a metamaterial with specific properties tailored to capture different waveforms and transform them into a usable form. After successful tests, the developers claim that the energy source can be signals from satellites, sound or WiFi networks.
“This design can be adapted to transform radiation of different frequencies and natures, including vibration and sound,” says Katko.
In our age, when we are constantly surrounded by various types of radiation - television and radio broadcasts, mobile networks, etc. - this technology will allow us to charge our phones wherever we are.
Hawks and Katko connected 5 metamaterial fiberglass plates in series with an interwoven copper conductor. The resulting device converts WiFi signal into a current voltage of 7.3 V, while the USB standard is limited to 5 V. The energy conversion efficiency is 36.8%, which is comparable to a solar panel.
The metamaterial was obtained by combining fiberglass, copper and gold and has such an unusual combination of properties of the original materials that it can easily be called a “supermaterial”.
"Imagine . In this fabric, light can only pass through the threads. If you make a hole in it with a needle, the light will go around it, maintaining the original path of movement, since it can only move along the thread. The light will continue to move, but the hole will remain essentially "invisible," explains David Smith of Duke University.
The metamaterial works in a similar way, controlling the way waves move through its structure, making it possible to trap those waves and convert their energy.
Researchers report that this metamaterial can be used to improve the energy efficiency of our homes and apartments. For example, the ceiling can be covered with such material and will pick up the wireless Internet signal, as if reusing the energy that is usually lost.
As we continue to plug our mobile devices into power sockets, technology advancements are in full swing. Hawks and Katko are working on increasing efficiency and miniaturization to make it possible to embed such a device into a mobile phone. And we will finally stop worrying about the charger forgotten at home.
From: dailymail.co.uk
Wireless chargers are already rapidly gaining popularity and are beginning to actively occupy their niche in the market. But such technology is already actively stepping on the heels of such an idea as charging a phone via Wi-Fi.
Chronology of development
The idea of transmitting energy over long distances without the use of accompanying conductors has long been exciting the minds of the best thinkers on the planet. The first progress in this matter began at the beginning of the 20th century.
The well-known Serbian scientist Nikola Tesla discovered, implemented and described such technology. But society was not ready for such technologies, since the memories of the witch hunt and incidents in Salem were still alive in the people’s memory, and therefore the technology was consigned to oblivion and sank into oblivion. But only up to a certain point.
A lot of time has passed since that moment, several world wars have happened, and now humanity has reached a level of development at which ideas that were almost a century old are not so crazy and unacceptable.
In addition, technical progress and the evolution of microprocessor technology are a very good help for converting electromagnetic waves into a directed flow of electrical energy.
There is no doubt that somewhere in closed facilities a similar technology has long been developed and brought to perfection. But these devices are unlikely to be used for industrial purposes. Therefore, I propose to consider those options that were initially aimed at entering the civilian market.
Current level of development
The first time we heard that charging a phone via Wi-Fi had become possible was about five years ago. This device was demonstrated at CES 2010 under the name RCA Airnergy Charger. According to descriptions of the operating principle, it was similar to the device proposed by Tesla.
Airnergy
The device was a small box of quite acceptable dimensions for constantly carrying in a jacket pocket; A cable came out of the box to connect to the phone. Inside there was a small circuit with a Wi-Fi signal receiver and a small capacity battery. Specific technical data were not published, but a figurative model of the device’s operation was outlined.
The receiver intercepts radio waves through which information is transported, registers their vibrations, frequency and amplitude. After which the circuit arranges them in such an order that they are no different from electricity fluctuations. Having completed the transformation, the newly generated electricity begins to fill the battery capacity. All that remains is to connect the device and watch how charging occurs.
But, alas, despite the genius of the idea, its implementation left much to be desired. The general operating methodology, ergonomics and internal design of the board were not very well polished and did not even allow it to enter the market. What can we say about the ability to compete with traditional methods of power supply.
Efficiency was abysmally low, despite the fact that the presentation claimed to charge a BlackBerry device from 30% to full charge in just 90 minutes. But in reality, the technology was crude, and the release of the device announced for the summer of the same year never materialized. Its cost should have been about 40 US dollars.
Product from Energous
Currently, the Energous company already sells such a device. Technological subtleties are not disclosed for reasons of intellectual property protection, since this technology is already more advanced than that previously described.
There is no longer any need to connect to a gadget for charging. The device itself converts the waves in such a way that they are focused not on data transmission, but on replenishing the charge level. The only significant drawback is that it works in only one mode: the device either charges a mobile device or provides access to the network.
Perhaps, if it weren’t for such a specific operating principle and the need to buy new smartphone, then the device would find its audience.
Power over Wi-Fi
Finally we got to the flagship of the implementation of such an idea. At the end of the first half of this year, it became known that the Washington Research University was at the stage of actively testing a new technology, power over Wi-Fi, which even then made it possible to charge not only the batteries of mobile devices. Satisfactory results were also obtained when replenishing the battery charge level in the watch.
Compared with the previous two charging methods, the this method there are several distinctive features.
Firstly, there is no need to buy separate special devices or a new smartphone. All you need to do is reflash home router. This will in no way affect its performance as an information relay. No hardware changes are required at all.
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