A thin stretchable interface for tangential force measurement

We have developed a simple skin-like user interface that can be easily attached to curved as well as flat surfaces and used to measure tangential force generated by pinching and dragging interactions. The interface consists of several photoreflectors that consist of an IR LED and a phototransistor and elastic fabric such as stocking and rubber membrane. The sensing method used is based on our observation that photoreflectors can be used to measure the ratio of expansion and contraction of a stocking using the changes in transmissivity of IR light passing through the stocking. Since a stocking is thin, stretchable, and nearly transparent, it can be easily attached to various types of objects such as mobile devices, robots, and different parts of the body as well as to various types of conventional pressure sensors without altering the original shape of the object. It can also present natural haptic feedback in accordance with the amount of force exerted. A system using several such sensors can determine the direction of a two-dimensional force. A variety of example applications illustrated the utility of this sensing system.

[1]  Naoki Yamane,et al.  Methods to Enhance Accuracy of an Optical Three-axis Tactile Sensor , 2000 .

[2]  Patrick Baudisch,et al.  Soap: a pointing device that works in mid-air , 2006, UIST.

[3]  Ivan Poupyrev,et al.  Sensing through structure: designing soft silicone sensors , 2010, TEI.

[4]  H. Shinoda,et al.  3D shape measuring sheet utilizing gravitational and geomagnetic fields , 2008, 2008 SICE Annual Conference.

[5]  Masatoshi Ishikawa,et al.  Khronos projector , 2005, SIGGRAPH '05.

[6]  Takanori Shibata,et al.  Social Effects of Robot Therapy in a Care House - Change of Social Network of the Residents for Two Months , 2007, Proceedings 2007 IEEE International Conference on Robotics and Automation.

[7]  M. Shimojo,et al.  A tactile sensor sheet using pressure conductive rubber with electrical-wires stitched method , 2004, IEEE Sensors Journal.

[8]  Yasuo Kuniyoshi,et al.  Conformable and scalable tactile sensor skin for curved surfaces , 2006, Proceedings 2006 IEEE International Conference on Robotics and Automation, 2006. ICRA 2006..

[9]  Ramesh Raskar,et al.  Second Skin: Motion capture with actuated feedback for motor learning , 2009, 2010 IEEE Virtual Reality Conference (VR).

[10]  Leah Buechley,et al.  Making textile sensors from scratch , 2010, TEI '10.

[11]  V. Lumelsky,et al.  Sensitive skin , 2000, IEEE Sensors Journal.

[12]  Masahiko Inami,et al.  Finding the Right Way for Interrupting People Improving Their Sitting Posture , 2011, INTERACT.

[13]  Heather Elliott-Famularo.  ACM SIGGRAPH 2004 Emerging technologies , 2004 .

[14]  Geehyuk Lee,et al.  Force gestures: augmenting touch screen gestures with normal and tangential forces , 2011, UIST.

[15]  Ross T. Smith,et al.  Digital foam interaction techniques for 3D modeling , 2008, VRST '08.

[16]  Andreas Krause,et al.  Robust, low-cost, non-intrusive sensing and recognition of seated postures , 2007, UIST.

[17]  Hiroshi Ishiguro,et al.  Haptic Communication Between Humans and Robots , 2005, ISRR.

[18]  Masayuki Inaba,et al.  Development of soft sensor exterior embedded with multi-axis deformable tactile sensor system , 2009, RO-MAN 2009 - The 18th IEEE International Symposium on Robot and Human Interactive Communication.

[19]  Guy Weinzapfel,et al.  One-point touch input of vector information for computer displays , 1978, SIGGRAPH '78.

[20]  Lucy E. Dunne.  A Coarse Desktop Method for Evaluating Transmission of Vibration through Textile Layers , 2009, 2009 International Symposium on Wearable Computers.