An Aussie Science Breakthrough Could Reinvent Wi-Fi
The internet of things is built on tiny, low-power, often wireless sensors that have small and very specific tasks. These devices are usually battery powered, which is convenient at low energy usage levels but which can be an impediment to long-term use when those batteries regularly require replacement
more…
CrazyNeutrino said:
An Aussie Science Breakthrough Could Reinvent Wi-FiThe internet of things is built on tiny, low-power, often wireless sensors that have small and very specific tasks. These devices are usually battery powered, which is convenient at low energy usage levels but which can be an impediment to long-term use when those batteries regularly require replacement
more…
It was the Aussie invention of fast-fourier-transform-on-a-chip that kickstarted wifi in the first place. But this is different.
“A team of researchers at the Australian National University has accurately modeled how much energy the wireless transfer of information takes from low-power sensors, which is the first step in designing devices that can harvest power from the ambient radio frequency communications in the air around them.”
Energy harvesting from ambient radio signals. On a big scale it can be done with lots of copper wire, or being close to a radio transmitter. Utilities companies tend to dislike people doing that.
There are already systems for reducing power usage during cellnet communication by detecting local signal strengths.
Overall, it doesn’t seem like too stupid an idea.
mollwollfumble said:
Overall, it doesn’t seem like too stupid an idea.
Please try and contain your enthusiasm.
The Rev Dodgson said:
mollwollfumble said:
Overall, it doesn’t seem like too stupid an idea.
Please try and contain your enthusiasm.
It is just the right about of stupid
one application for the Internet of things is speed zones
different speed zones can transmit a signal indicating the max speed for that zone
this would complement any existing technology that driver less cars would use
also
it would be a great way for cruise control fans to set auto cruise to follow speed zones
A speed zone say a 40kmh school zone transmits its 40 kmh to any car that has the ability to read it, the auto cruise then adjusts from say 60 down to 40 then up to 60 again at the other end
CrazyNeutrino said:
one application for the Internet of things is speed zonesdifferent speed zones can transmit a signal indicating the max speed for that zone
this would complement any existing technology that driver less cars would use
also
it would be a great way for cruise control fans to set auto cruise to follow speed zones
A speed zone say a 40kmh school zone transmits its 40 kmh to any car that has the ability to read it, the auto cruise then adjusts from say 60 down to 40 then up to 60 again at the other end
another use for that type of technology would be for car parks
a car park could indicate which park lots are free
Any road sign or freeway sign could transit a signal indicating its message.
Same for street name signs etc
Energy harvesting from ambient radio signals. On a big scale it can be done with lots of copper wire, or being close to a radio transmitter. Utilities companies tend to dislike people doing that.
Why dont utilities companies harvest energy from high power transmission lines and feed it back into the system, has anyone working out the figures, is it viable etc
also roads can have highly charged particles on their surfaces
be great to retrieve and store that energy as well
CrazyNeutrino said:
Energy harvesting from ambient radio signals. On a big scale it can be done with lots of copper wire, or being close to a radio transmitter. Utilities companies tend to dislike people doing that.Why dont utilities companies harvest energy from high power transmission lines and feed it back into the system, has anyone working out the figures, is it viable etc
yes and no
dv said:
CrazyNeutrino said:
Energy harvesting from ambient radio signals. On a big scale it can be done with lots of copper wire, or being close to a radio transmitter. Utilities companies tend to dislike people doing that.Why dont utilities companies harvest energy from high power transmission lines and feed it back into the system, has anyone working out the figures, is it viable etc
yes and no
Tamb said:
dv said:
CrazyNeutrino said:
Energy harvesting from ambient radio signals. On a big scale it can be done with lots of copper wire, or being close to a radio transmitter. Utilities companies tend to dislike people doing that.Why dont utilities companies harvest energy from high power transmission lines and feed it back into the system, has anyone working out the figures, is it viable etc
yes and no
Does the energy actually leave the transmission line (except as heat) or is it “stolen” by the harvester?
some energy leaves the transmission line
it is collected, some articles describe the process
it is similar to charging pads but they work close to the device being charged
German student creates electromagnetic harvester that gathers free electricity from thin air
his device charges a AA battery, but takes a day to do it, you would have to get very close to the transmission lines to speed up wireless charging, that would be dangerous.
CrazyNeutrino said:
Tamb said:
dv said:yes and no
Does the energy actually leave the transmission line (except as heat) or is it “stolen” by the harvester?some energy leaves the transmission line
it is collected, some articles describe the process
it is similar to charging pads but they work close to the device being charged
German student creates electromagnetic harvester that gathers free electricity from thin air
his device charges a AA battery, but takes a day to do it, you would have to get very close to the transmission lines to speed up wireless charging, that would be dangerous.
crystal radio sets use the same principle described in one of the articles
I had a crystal radio when I was a kid
CrazyNeutrino said:
one application for the Internet of things is speed zonesdifferent speed zones can transmit a signal indicating the max speed for that zone
this would complement any existing technology that driver less cars would use
also
it would be a great way for cruise control fans to set auto cruise to follow speed zones
A speed zone say a 40kmh school zone transmits its 40 kmh to any car that has the ability to read it, the auto cruise then adjusts from say 60 down to 40 then up to 60 again at the other end
Let’s increase all speed zones, all through Australia by 10 km/hr.
I can’t see a good reason why not.
Mathematically, traffic = const. × population ÷ speed
So increasing speed reduces traffic.
And to a first approximation
danger = const. × traffic × speed
Substituting the equation for traffic gives
danger = const. × population.
So increasing speed zones throughout Australia reduces traffic everywhere without sacrificing safety.
>Energy harvesting from ambient radio signals. On a big scale it can be done with lots of copper wire, or being close to a radio transmitter. Utilities companies tend to dislike people doing that.
Why dont utilities companies harvest energy from high power transmission lines and feed it back into the system, has anyone working out the figures, is it viable etc.
couple it efficiently enough, you may as well plug in