Project

Low-Power Gesture Input with Wrist-Worn Pressure Sensors

Groups

We demonstrate an always-available, on-body gestural interface. Using an array of pressure sensors worn around the wrist, it can distinguish subtle finger pinch gestures with high accuracy (>80?). We demonstrate that it is a complete system that works wirelessly in real time. The device is simple and light-weight in terms of power consumption and computational overhead. Prototype's sensor power consumption is 89uW, allowing the prototype to last more then a week on a small lithium polymer battery. Also, device is small and non-obtrusive, and can be integrated into a wristwatch or a bracelet. Custom pressure sensors can be printed with off-the-shelf conductive ink-jet technology. We demonstrate that number of gestures can be greatly extended by adding orientation data from an accelerometer. Also, we explore various usage scenarios with the device.

We demonstrate an always-available, on-body gestural interface. Using an array of pressure sensors worn around the wrist, it can distinguish subtle finger pinch gestures with high accuracy (>80?). We demonstrate that it is a complete system that works wirelessly in real time. The device is simple and light-weight in terms of power consumption and computational overhead. Prototype's sensor power consumption is 89uW, allowing the prototype to last more then a week on a small lithium polymer battery. Also, device is small and non-obtrusive, and can be integrated into a wristwatch or a bracelet. Custom pressure sensors can be printed with off-the-shelf conductive ink-jet technology. We demonstrate that number of gestures can be greatly extended by adding orientation data from an accelerometer. Also, we explore various usage scenarios with the device.