New tech uses Wi-Fi to count people through walls Post a Comment <p>Whether you’re trying to figure out how many students are attending your lectures or how many evil aliens have taken your Space Force brethren hostage, Wi-Fi can now be used to count them all.</p> <p>The system, created by researchers at UC Santa Barbara, uses a single Wi-Fi router outside of the room to measure attenuation and signal drops. From the release:</p> <blockquote> <p>The transmitter sends a wireless signal whose received signal strength (RSSI) is measured by the receiver. Using only such received signal power measurements, the receiver estimates how many people are inside the room — an estimate that closely matches the actual number. It is noteworthy that the researchers do not do any prior measurements or calibration in the area of interest; their approach has only a very short calibration phase that need not be done in the same area.</p> </blockquote> <p>This means that you could simply walk up to a wall and press a button to count, with a high degree of accuracy, how many people are walking around. The system can measure up to 20 people in its current form.</p> <p>The system uses a mathematical model to “see” people in the room based on signal strength and attenuation. The system uses off-the-shelf components and they’ve tested it in multiple locations and found that their total accuracy is two people or less with only one Wi-Fi device nearby.</p> <p>Bodies and objects essentially absorb Wi-Fi as they move around in rooms, allowing the system to find discrete things in the space. Sadly it can’t yet map their position in the room, a feature that could be even more helpful in the future.</p> <div class="feedflare"><a href="http://feeds.feedburner.com/~ff/crunchgear?a=y7rvV6KRFPQ:bPeQtjb6Fe8:V_sGLiPBpWU"><img border="0" src="https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tv8zZRpO5GFw2UX82_iQk3MVG8RveZQkYc-E9SgSjnxSRID1TLNL-cFbQ3UwSitqE9g6UMobhoNDNR90tY0F5-_S97wUWs2ZGhp9pMN22lPnlQCAFVTv0J3LA8o0IpmtrDRkJ18cB2h8jlafZSsUQJuvw=s0-d"></a> <a href="http://feeds.feedburner.com/~ff/crunchgear?a=y7rvV6KRFPQ:bPeQtjb6Fe8:F7zBnMyn0Lo"><img border="0" src="https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tf_spsELAZqnMuYYL9GDBkyqeF6Sq-WGIlfM_Z8w536VBUGb6vRUR79-Qu7sAyLwmeVlM4RSNYToXCLuXqJ2t8Hsjn368sXvknO59EOglJQRKJ0oBwY2SFE8dF7k0umvwCv1VzJqEc2mpv2rF6dnrmIW4=s0-d"></a> <a href="http://feeds.feedburner.com/~ff/crunchgear?a=y7rvV6KRFPQ:bPeQtjb6Fe8:yIl2AUoC8zA"><img border="0" src="https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sN7epXbSluUA6bsC-ICXV4RsvVaxccPdyZ4qnxxG5ZnL_e_oQ5RDUyzY5_IBm4u_6jv1vW2TcaUFsRmZB-JDUwR6ai3L4MqOVejvCXDLOw5-4L3HnH9uh5SlU=s0-d"></a></div> <br /> <br /> <a href="https://techcrunch.com/2018/09/25/new-tech-uses-wi-fi-to-count-people-through-walls/">Read More</a> Share : You may like these posts :MPs 'misled' over renewable targetsSony says goodbye to Betamax tapesGoogle Maps upgraded to work offlineMicrosoft to open UK data centres Post a Comment for "New tech uses Wi-Fi to count people through walls"
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