Posts Tagged ‘ Wireless ’

Harnessing Wireless Signals

It’s not a new thing that radio frequency signals can be used as both a power source and a communication medium, and moreover, the problem of wireless power has been in research since the time of Tesla. There have been perpetual researches on this topic since many years. As radio frequency signals are both the power source and the communication medium, therefore, we can re-purpose radio frequency signals that are already around us into both a source of power and a communication medium.

This technology can be useful in some of the way but it has some pitfalls too. Like it depends on radio frequency signal, so apparently it is useless at the places where there is no radio frequency signal, its effect on the other wireless system or on those from which it draws power or on anything other, will be useless in the Faraday cage like places. That is the one side, now how can it help the humans: well! It can be useful in number of ways; can be used in smart devices like phones, watches, sensors and any other wearable electronic device. This technology can be embedded into smartphones (or into other battery dependent devices) and when the battery dies, the phone could still be used for communication by using radio frequency signals. In a nutshell, this technology has ample of things to offer.

I recently read an article which says a team of researchers from the University of Washington is working on this kind of technology. They have created a wireless technology which they describe as Ambient Backscatter, which takes advantage of the TV and cellular transmissions that already surround us around the clock. It transforms existing wireless signals into both a source of power and a communication medium. The researchers built small, battery-free devices with antennas that can detect, harness and reflect a TV signal, which then is picked up by other similar devices. Using ambient backscatter, these devices can interact with users and communicate with each other without using batteries. They exchange information by reflecting or absorbing pre-existing radio signals.

There is always someone working on something somewhere around the earth, and as there are endless possibilities, so there can be endless creation which can be created by connecting the right pieces in the right place!

Reference: http://www.sciencedaily.com/releases/2013/08/130813130328.htm

Google Search in the Physical World

In future, it could be possible to run a Google search in the physical world. For example, asking Google “where are my keys?” would give you the right answer if they have been fitted with tiny motes in your home, in your surroundings or in your place. A mote is a node in a wireless sensor network that is capable of performing some processing, gathering sensory information and communicating with other connected nodes in the network.

Thousands of tiny wireless sensors(motes) could one day be used to monitor your world. They will have tiny CPUs that run programs on a skeleton operating system and be able to access equally small banks of RAM and flash memory. These sensor-packed machines can be embedded in buildings and objects in large numbers, may be in hundreds or even thousands as per requirement according to the objects to provide constant updates on the world around us.

The motes will be smart enough to collect power from their surrounding. The motes will live off the power they can get from their surroundings. A mote near a light source might use a tiny solar panel, while a mote running somewhere with greater temperature extremes can be built to tap into that, by converting the heat energy that flows between hot and cold into electricity. These tiny wireless sensors(motes) could be used to monitor every tiny movement of large structures like bridges or skyscrapers in coming decades. The motes in a house could report back on lighting, temperature, carbon monoxide levels and occupancy. With motes embedded in all of your belongings it might be possible to run interent in the physical world to search your queries, and you would hear or get the right answers.

Reference article: http://www.newscientist.com/article/mg21829146.400-smart-dust-computers-are-no-bigger-than-a-snowflake.html

The future of electricity transmission

Day by day, technology is advancing very rapidly; there will be many changes in coming decades in the world of technology and one of them will be wireless transmission of electricity. Yes, in the coming few decades electricity will be transmitted without the use of wires.

The first person to actually make wireless transmission of power possible was Nikola Tesla. Tesla demonstrated wireless energy transfer to power electronic devices in 1891, and aspired to intercontinental wireless transmission of industrial power in his unfinished Wardenclyffe Tower project and still wireless transmission of electricity is a field of research. It might be possible that this technology will come into existence in few decades.

Here’s something about this technology:

Primarily, this technology may starts from mid-range transmission methods that could charge or even power portable devices such as cell phones, laptops, PDA and all that kind of devices or possibly all other range of electric and electronic appliances. And for sure, this technology will going to eliminate the need for multiple wall sockets and bulky cables and will greatly reduce clutter in homes and offices. In place of batteries, electronic devices will have antennas to draw power from a single power node mounted in the ceiling or in the wall of a room. Electromagnetic waves are transmitted through the air from the device present in the ceiling or in the wall. These waves are then received by the device like cell phone or other appliance through their receiving antenna. And in this way electricity will be transmitted without using wires. So definitely, there will be new way of transmission of electricity in the coming decades, maybe by the late 2020s.