Using Piezoelectric Materials for Wearable Electronic Textiles
ISWC '02 Proceedings of the 6th IEEE International Symposium on Wearable Computers
Modeling and simulating electronic textile applications
Proceedings of the 2004 ACM SIGPLAN/SIGBED conference on Languages, compilers, and tools for embedded systems
Dealing with sensor displacement in motion-based onbody activity recognition systems
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
Recognizing Upper Body Postures using Textile Strain Sensors
ISWC '07 Proceedings of the 2007 11th IEEE International Symposium on Wearable Computers
Modeling and simulation of sensor orientation errors in garments
BodyNets '09 Proceedings of the Fourth International Conference on Body Area Networks
Estimating posture-recognition performance in sensing garments using geometric wrinkle modeling
IEEE Transactions on Information Technology in Biomedicine
Measuring joint movement through garment-integrated wearable sensing
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication
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In this paper we describe a novel method for detecting bends and folds in fabric structures. Bending and folding can be used to detect human joint angles directly, or to detect possible errors in the signals of other joint-movement sensors due to fabric folding. Detection is achieved through measuring changes in the resistance of a complex stitch, formed by an industrial coverstitch machine using an un-insulated conductive yarn, on the surface of the fabric. We evaluate self-intersecting folds which cause short-circuits in the sensor, creating a quasi-binary resistance response, and non-contact bends, which deform the stitch structure and result in a more linear response. Folds and bends created by human movement were measured on the dorsal and lateral knee of both a robotic mannequin and a human. Preliminary results are promising. Both dorsal and lateral stitches showed repeatable characteristics during testing on a mechanical mannequin and a human.