Acoustic Sensors Make Any Surface a Touch Pad
An anonymous reader writes "Using cheap acoustic sensors the surface of any 3D object can be instantly made into a touch-sensitive interface capable of tracking two objects at once. Its creators are planning to make hospitals more hygienic — keyboards and mice will be replaced by desks wired to perform as keyboards and touchpads. A video shows it in action [.wmv]."
Because it's much easier to clean a flat surface rather than a keyboard, or even a mouse.
Now if a slashsdot editor went to the trouble of requesting permission to host the video (the benefit to the video owner is to stave off
:wq
Some 20 years ago, when electronic daisywheel typewriters were starting to take over, Smith-Corona/Marchant came out with a novel way to keep using their mechanical typewriter tooling. They used a conventional mechanical keyboard, where the keys stuck a bar of steel with a piezoelectric sensor at either end.
The delay between the time the impulse reached each sensor enabled a microprocessor to pinpoint exactly where the bar was impacted, and thus deduce which key was pressed.
That's basically the same principle applied, but in three dimensions.
Roland patented and employed a suspiciously similar tech years ago for their V-Drum electronic percussion system. Perhaps Roland's patents only apply to musical instruments, but the concept of deriving placement and distance from piezo electric sensors is nothing new.
Elo Touchsystems / Tyco already has a product out there that works exactly this way...and a myriad of patents. Acoustic Pulse Recognition: http://media.elotouch.com/pdfs/marcom/apr_wp.pdf
It's a relatively new product but it's already way past the research stage and well into production.