Relief may be on the horizon for anyone who has ever jumped around a room like a jack-in-the-box to get motion-sensing lights to turn back on. A new motion sensor based on metamaterials is sensitive enough to monitor a person’s breathing.
In a pair of new studies, researchers from Duke University and Institut Langevin, France, have shown that patterns made by radio waves can detect a person’s presence and location anywhere inside a room.
The findings appeared recently in Scientific Reports and Aug. 6 in the Physics Review Letters.
This new motion-sensing technology could lead to new smart home devices for energy savings, security, healthcare and gaming.
“Energy companies don’t love infrared motion detectors because they have lots of problems,” said David R. Smith, the James B. Duke Professor of Electrical and Computer Engineering at Duke. “The amount of space they can cover is limited, a person has to be within their line of sight to be detected, and probably everyone has had the experience where the lights have gone off because they’ve sat still for too long. Radio waves can get around all of these limitations.”
In their initial paper published earlier this year, the researchers took advantage of patterns created by radio waves bouncing around a room and interfering with themselves. These unique patterns change with the slightest perturbation of the room’s objects, allowing a sensitive antenna to detect when something moves in or enters the room. And by comparing how these patterns change over time, they can also be used to detect cyclical movements like a fan blade turning—or even a person breathing.
In the latest paper, the team shows that with a bit of training, the system can also extract information necessary to locate objects or people in a space. The demonstration system was taught the pattern of radio waves scattered by a triangular block placed in 23 different positions on a floor. That calibration is enough not only to distinguish between the learned 23 scenarios, but to also distinguish the positions of three identical blocks placed in any one of 1,771 possible configurations.
The technology works by taking advantage of the way radio waves behave in an enclosed room. Their ability to continuously reflect off multiple surfaces creates complex interference patterns throughout a room. In the past, this complexity has been an obstacle for systems trying to locate the origin of a signal. But Smith and his colleagues have now shown that this same complexity can be tapped to detect movement and locate objects within a room.
The Latest on: Motion-sensing
via Google News
The Latest on: Motion-sensing
- Halloween Hacks: Motion Sensing Fog Machineon May 7, 2020 at 5:00 pm
[monkeysinacan] wanted to add a fog machine to his Halloween display, but he says that the cheaper consumer-grade models are pretty unruly beasts. He cites short duty cycles and tricky fog control ...
- Fed. Circ. Urged To Restore $10M IP Verdict Against Nintendoon May 5, 2020 at 7:25 pm
A technology company urged the Federal Circuit on Monday to restore the $10.1 million patent infringement verdict it won against Nintendo over motion-sensing technology, arguing that a trial court got ...
- motion sensingon May 4, 2020 at 5:00 pm
Regardless, it works as advertised, and now nobody has to peel potatoes in the dark any more. Continue reading to check out a quick video demo of the motion-sensing light system.
- A 14-Button Motion-Sensing Steering Wheel Only a PC Gamer Could Love (Or Use)on April 30, 2020 at 5:00 pm
The SRW-S1 uses motion-sensing technology to determine which way you turn the wheel while holding it in front of you like some sort of prop-based pantomime of driving. Braking, shifting ...
- Sony to unveil motion-sensing controller for the Playstation 3?on April 30, 2020 at 5:00 pm
Tired of your bush league Wii-owning friends making fun of the lame Sixaxis motion-sensing technology in your PS3 controller? Hang in there as you may not have to endure their ridicule for much ...
- Venus and Serena Williams back on court as they take part in Mario Tennis tournamenton April 29, 2020 at 1:00 pm
While Andy Murray continues to impress at the Virtual Madrid Open, a different kind of electronic tennis event has been scheduled for Sunday evening, with an equally strong cast that includes both ...
- New device turns almost any screen into a touchless touchscreenon April 27, 2020 at 5:13 pm
A group of former Samsung engineers is putting their heads together to create new a device called Glamos. It uses LIDAR technology to turn just about any screen into a fully interactive touchscreen.
- Microsoft To Buy Motion-Sensing Companyon April 19, 2020 at 5:00 pm
Here we go again. Fresh off speculation Microsoft were working on a motion-sensing controller for current generation hardware, seems the company is now in talks to buy a firm specialising in ...
- Sensor Sense: Optical Motion Sensing for Webson April 13, 2020 at 5:00 pm
In many printing, packaging, and general web applications, it is often necessary to know whether the web is moving and if so, in which direction. One traditional method of getting this information ...
via Bing News