11/9/2022 0 Comments Huge tits with xray vision vid![]() Mostofi thinks back to the Tōhoku Earthquake in 2011 and the tsumani that caused widescale destruction and triggered the Fukushima nuclear disaster. Is this wood? Is this human?” Robots to the rescueĪpplications of this technology for search and rescue are immediately apparent. “In the future, we should be able to say something more about what kind of object is there. “What we extract also tells us something about the material property,” said Mostofi. But Mostofi’s team has found that there’s even more information in the Wi-Fi signature. Initially, the goal was to devise a system that could tell you the location of the objects, their geometry, and their shape – and early tests have confirmed that this is possible, albeit with relatively low resolution so far. “We've shown that you can actually do this.” Brick enclosure with hidden barrel, diagram (left) versus Wi-Fi scan (right).Ĭredit: Yasamin Mostofi, UC Santa Barbara “Can they image that person? Can it image the object that is there? Maybe there are multiple objects – can they image them correctly?” said Mostofi. Once the other robot receives the signal, the trick is to then reconstruct what the signal passed through. The objects leave a signature on the Wi-Fi signal. “The objects interact with it, depending on their material property and their location.” “One robot transmits, and that transmission goes through the object,” explained Mostofi. To peek through the wall, two remote vehicles passed around the enclosure. In the middle, they placed objects: a barrel, two barrels, a graduate student. ![]() To test the system, Mostofi and her lab constructed a tall, square enclosure out of brick on the UC Santa Barbara campus. We wanted to see if we could give X-ray vision to unmanned vehicles with only Wi-Fi signals.” “We basically wanted to see if we can see behind walls with Wi-Fi signals.”Īnd if that doesn’t sound fantastic enough, Mostofi decided to throw some robots into the mix. ![]() “Our first interest was X-ray vision with Wi-Fi,” said Mostofi. They lose energy as they pass through objects, like light through a lampshade, and they can bounce off of objects, like light off a mirror. If you’ve ever tried to connect to the internet when there’s distance and walls between you and your router, you know that Wi-Fi signals are affected by the environment. “Can these signals be used not just for communication but for sensing the environment? We started looking at this problem about nine years ago,” said Yasamin Mostofi, associate professor in the department of electrical & computer engineering at UC Santa Barbara. As a result, we're bombarded by Wi-Fi, essentially low-frequency radio waves, nearly everywhere we go. With the proliferation of mobile devices around the world, the demand for connectivity is constantly increasing. How can rescuers know how many people are trapped and where they are? A UC Santa Barbara researcher may have a solution using something that’s around us all the time: Wi-Fi. An earthquake strikes a major city, a large building collapses and people are trapped inside. ![]()
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