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Sensors 2016, 16(3), 326; doi:10.3390/s16030326

Piezoresistive Soft Condensed Matter Sensor for Body-Mounted Vital Function Applications

1
Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
2
STBL Medical Research AG, Höh-Rohnenweg 6, Wilen 8832, Switzerland
*
Author to whom correspondence should be addressed.
Academic Editors: Daniel Teichmann and Steffen Leonhardt
Received: 9 December 2015 / Revised: 17 February 2016 / Accepted: 19 February 2016 / Published: 4 March 2016
(This article belongs to the Special Issue Noninvasive Biomedical Sensors)
View Full-Text   |   Download PDF [10522 KB, uploaded 4 March 2016]   |  

Abstract

A soft condensed matter sensor (SCMS) designed to measure strains on the human body is presented. The hybrid material based on carbon black (CB) and a thermoplastic elastomer (TPE) was bonded to a textile elastic band and used as a sensor on the human wrist to measure hand motion by detecting the movement of tendons in the wrist. Additionally it was able to track the blood pulse wave of a person, allowing for the determination of pulse wave peaks corresponding to the systole and diastole blood pressures in order to calculate the heart rate. Sensor characterization was done using mechanical cycle testing, and the band sensor achieved a gauge factor of 4–6.3 while displaying low signal relaxation when held at a strain levels. Near-linear signal performance was displayed when loading to successively higher strain levels up to 50% strain. View Full-Text
Keywords: piezoresistive; sensor; composite; hybrid; wearable computing; carbon black; pulse wave; polymer; motion capture piezoresistive; sensor; composite; hybrid; wearable computing; carbon black; pulse wave; polymer; motion capture
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Melnykowycz, M.; Tschudin, M.; Clemens, F. Piezoresistive Soft Condensed Matter Sensor for Body-Mounted Vital Function Applications. Sensors 2016, 16, 326.

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