Skintrack: Using the body as an electrical waveguide for continuous finger tracking on the skin
Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems, 2016•dl.acm.org
SkinTrack is a wearable system that enables continuous touch tracking on the skin. It
consists of a ring, which emits a continuous high frequency AC signal, and a sensing
wristband with multiple electrodes. Due to the phase delay inherent in a high-frequency AC
signal propagating through the body, a phase difference can be observed between pairs of
electrodes. SkinTrack measures these phase differences to compute a 2D finger touch
coordinate. Our approach can segment touch events at 99% accuracy, and resolve the 2D …
consists of a ring, which emits a continuous high frequency AC signal, and a sensing
wristband with multiple electrodes. Due to the phase delay inherent in a high-frequency AC
signal propagating through the body, a phase difference can be observed between pairs of
electrodes. SkinTrack measures these phase differences to compute a 2D finger touch
coordinate. Our approach can segment touch events at 99% accuracy, and resolve the 2D …
SkinTrack is a wearable system that enables continuous touch tracking on the skin. It consists of a ring, which emits a continuous high frequency AC signal, and a sensing wristband with multiple electrodes. Due to the phase delay inherent in a high-frequency AC signal propagating through the body, a phase difference can be observed between pairs of electrodes. SkinTrack measures these phase differences to compute a 2D finger touch coordinate. Our approach can segment touch events at 99% accuracy, and resolve the 2D location of touches with a mean error of 7.6mm. As our approach is compact, non-invasive, low-cost and low-powered, we envision the technology being integrated into future smartwatches, supporting rich touch interactions beyond the confines of the small touchscreen.
ACM Digital Library