wirelesssensors
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Dust-sized wireless sensors could control prosthetics someday
See that minuscule component in the image above? That's a wireless sensor, and someday, doctors could slip it into our bodies to monitor our organs like a microscopic Fitbit or even to give quadri- and paraplegics the power to control robotic arms or legs. A team of scientists from the University of California, Berkeley have developed an early iteration of the sensor that's about the size of a grain of rice. Each sensor has a piezoelectric crystal that can convert ultrasound vibrations into energy. It also allows the teensy device to beam back data collected from nerve cells in the brain if it's used to control bionic limbs.
Researchers take full control of cockroach's movement, turn it into a wireless sensor
Built-in power supply? Check. Ability to survive anything? Check. Easy to control? Okay, anyone who's had a cockroach as an uninvited houseguest knows that's not the case. So, rather than re-inventing the biological wheel with a robotic version, North Carolina State university researchers have figured out a way to remotely control a real Madagascar hissing cockroach. They used an off-the-shelf microcontroller to tap in to the roach's antennae and abdomen, then sent commands that fooled the insect into thinking danger was near, or that an object was blocking it. That let the scientists wirelessly prod the insect into action, then guide it precisely along a curved path, as shown in the video below the break. The addition of a sensor could allow the insects to one day perform tasks, liking searching for trapped disaster victims -- something to think about the next time you put a shoe to one.
Wireless Sensor Tags alert you to movement and temperature changes, fit on your keyring
There's plenty of sensor gear around for hobbyists to play with, but not so many polished products for the monitoring-obsessed. Cao Gadgets is attempting to fill that niche with its functionally named Wireless Sensor Tags -- small devices which monitor movement and temperature, notifying you if anything's amiss. A magnetometer registers movement by changes in its orientation, and can inform you of door openings or similar disturbances, while the temperature triggers are based on upper or lower thresholds. The $15 sensors (or $12 if you want three or more) have a battery life that should last several years depending on their setup, but there is one catch -- you also need the Tag Manager hub ($50), which plugs into your router via Ethernet. It keeps in frequent contact with any subordinates in its 200-foot range, and if after several attempts it finds one MIA, a warning can be sent in case any of your home guards have walked or fallen asleep. The tags also have inbuilt beepers which can be pinged to track down any rogue possessions they're partnered with, like your keys. A lot of thought has been put into micromanaging the tags, which are customizable through web-based, Android or iOS apps, and will send out alerts via email, Twitter, or push notifications on slates and phones (text-to-speech is available if you're too lazy to read). If you're into your data, you can also access trigger statistics from the software, complete with graphs. The home monitoring kit is available now, and instead of crashing your browser with too many embeds, we've decided to point you to the source below for the half-dozen demo vids.
Researchers develop wireless sensor network to measure physical activity
Wearable sensors that monitor physical activity are hardly anything new, but some researchers from MSU's Department of Kinesiology are taking the idea quite a bit farther with their latest project. They've developed a new system that employs a network of sensors that not only track movement, but can monitor things like tilt, posture and the proximity of limbs to each other. That, the researchers say, allows them to detect different types of activity, and more accurately measure the energy expended on them. Of course, it is still just a prototype, but it'll apparently soon be put to the test by some graduate students, and there's plenty of backing behind it -- the project is being funded two-year, $411,000 grant from the National Institutes of Health.
