Researchers say this technology could have applications as varied as gesture-controlled gaming devices that rival Microsoft's Kine ct system, motion capture for special effects in movies, or even the monitoring of hospital patients' vital signs. “It basically lets you see through walls,” said Fade AAIB, a Ph.D. student at MIT's Computer Science and Artificial Intelligence Lab and lead author of a new paper describing the system.
The team, led by Dina Atari, a professor of electrical engineering and computer science at MIT, has been developing wireless tracking technologies for a number of years. The new system, unveiled at the DIGRAPH Asia conference held from Nov. 2 to Nov. 5 in Japan, uses radio waves that are 1,000 times less powerful than Wi-Fi signals.
“These produce a much weaker signal, but we can extract far more information from them because they are structured specifically to make this possible,” AAIB told Live Science. The solution is an intelligent algorithm that can identify body parts across snapshots and use a simple model of the human skeleton to stick them together to create a silhouette, the researchers said.
But scanning the entire 3D space around the antenna array uses a lot of computer power, so to simplify things, the researchers borrowed concepts from military radar systems that can lock onto and track targets. This approach allows the system to identify which body parts a person moved, with 99 percent accuracy, from about 10 feet (3 meters) away and through a wall.
RF-Pose can detect human movement behind a wall using radio waves.MIT CSAILKatabi said doctors might use the technology to keep tabs on someone with Parkinson’s disease by watching for changes in gait that might indicate a looming problem. Computer algorithms analyze the reflected waves, homing in on the head, hands, feet and other key body parts to produce moving stick figures on a screen.
The technology could prove useful for a range of applications, including law enforcement, search and rescue, and healthcare.MIT CSAILKatabi and her team trained RF-Pose by giving it photographs of people as well as the crude images created by the reflected radio waves. Gives Hidalgo, a research associate at the Robotics Institute of Carnegie Mellon University in Pittsburgh, told NBC News MACH in an email that it was of limited use at this point because the radio signals it uses are unable to pass-through thick walls.
By flinging ultralow-power radio signals, 1,000 times milder than standard Wi-Fi, they can not only detect humans behind a wall but track their movements in fine detail. But instead of bouncing off planes and returning to the ground, the signal here travels through the wall, bounces off a human (we’re full of water, which radio signals have a hard time penetrating), and comes back through the wall and into a detector.
They set up a camera to simultaneously record a person they were bombarding with radio signals. What you end up with is a human visualized as blobs, which correspond to points on the body, like knees and shoulders.
The researchers then turn this into a stick figure that shows a person moving behind a wall in great detail. Such great detail, in fact, that the system could identify individuals 83 percent of the time, by first determining their unique features and movement style.
Imagine using it to non-intrusively keep tabs on the sleeping, eating, and moving schedules of an elderly parent, as well as signs of distress. “Think about the other extreme: You can deploy cameras everywhere in someone's home and try to get similar information,” Atari says.
This cutting-edge tool works with a dedicated app and an Android phone running version 5 or higher. Once installed, it lets you see inside walls made from common building materials including drywall and concrete, penetrating through insulation up to four inches deep.
With the Talbot DIY in-hand, there’s no doubt about the location of important components such as pipes, electric wires, cables, and studs. This device uses radio frequency (RF) technology to detect objects inside walls.
Talbot DIY is a game-changer, letting you see through the wall, so you can drill and hang objects safely, without risk of a dangerous electrical accident or expensive damage to plumbing. Highly convenient, this mode lets you save images of your wall for future use, so you don’t have to scan over and over again.
By adjusting the viewing intensity, you can zero in on a stud’s center or trace electric wire pathways and plumbing pipes, so it’s easier to avoid them when determining where to cut or drill. You’re now ready to hang shelves or cabinets, route cables for your VR entertainment system, or do any other important task that calls for seeing inside walls.
Talbot DIY was designed with the needs of builders, plumbers, electricians, and other contractors in mind, yet it’s affordable and user-friendly enough for even the most casual Diver. I work in an old health clinic on the eastern sea board.
The factors that effect radiation are: 1) Time 2) Distance 3) Shielding. One of the reasons the operator always stands behind a wall when taking X -rays is to prevent occupational exposure.
The machines and sources are shielded and calibrated (and regularly inspected) to control any random exposures. CIRC, the guns are shielded on the sides, so the beam is very directional.
CIRC, the guns are shielded on the sides, so the beam is very directional. The person in the office below would be exposed over a long period of time.
If it wasn't a good safety practice for a hygienist to stand behind a wall why would they bother? Because long term exposure is a risk, so your concern is valid.
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