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Multi-Functional Soft Strain Sensors for Wearable Physiological Monitoring

Bio-Inspired Robotics Lab, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK
Author to whom correspondence should be addressed.
Sensors 2018, 18(11), 3822;
Received: 22 September 2018 / Revised: 26 October 2018 / Accepted: 31 October 2018 / Published: 8 November 2018
(This article belongs to the Special Issue Wearable Sensors and Devices for Healthcare Applications)
PDF [1037 KB, uploaded 8 November 2018]


Wearable devices which monitor physiological measurements are of significant research interest for a wide number of applications including medicine, entertainment, and wellness monitoring. However, many wearable sensing systems are highly rigid and thus restrict the movement of the wearer, and are not modular or customizable for a specific application. Typically, one sensor is designed to model one physiological indicator which is not a scalable approach. This work aims to address these limitations, by developing soft sensors and including conductive particles into a silicone matrix which allows sheets of soft strain sensors to be developed rapidly using a rapid manufacturing process. By varying the morphology of the sensor sheets and electrode placement the response can be varied. To demonstrate the versatility and range of sensitivity of this base sensing material, two wearable sensors have been developed which show the detection of different physiological parameters. These include a pressure-sensitive insole sensor which can detect ground reaction forces and a strain sensor which can be worn over clothes to allow the measurements of heart rate, breathing rate, and gait. View Full-Text
Keywords: soft sensors; wearable sensors; gait detection soft sensors; wearable sensors; gait detection

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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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Hughes, J.; Iida, F. Multi-Functional Soft Strain Sensors for Wearable Physiological Monitoring. Sensors 2018, 18, 3822.

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