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Sensors 2019, 19(8), 1811; https://doi.org/10.3390/s19081811

Highly Sensitive and Durable Structured Fibre Sensors for Low-Pressure Measurement in Smart Skin

1
Research Centre of Smart Wearable Technology, Nanotechnology Center of Functional and Intelligent Textiles and Apparel, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, China
2
Engineering Research Center of Digitized Textile & Apparel Technology, Ministry of Education, College of Information Science and Technology, Donghua University, Shanghai 201620, China
*
Author to whom correspondence should be addressed.
Received: 5 March 2019 / Revised: 1 April 2019 / Accepted: 2 April 2019 / Published: 16 April 2019
(This article belongs to the Special Issue Smart Sensors and Smart Structures)
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Abstract

Precise measurements of low pressure are highly necessary for many applications. This study developed novel structured fibre sensors embedded in silicone, forming smart skin with high sensitivity, high durability, and good immunity to crosstalk for precise measurement of pressure below 10 kPa. The transduction principle is that an applied pressure leads to bending and stretching of silicone and optical fibre over a purposely made groove and induces the axial strain in the gratings. The fabricated sensor showed high pressure sensitivity up to 26.8 pm/kPa and experienced over 1,000,000 cycles compression without obvious variation. A theoretical model of the sensor was presented and verified to have excellent agreement with experimental results. The prototype of smart leg mannequin and wrist pulse measurements indicated that such optical sensors can precisely measure low-pressure and can easily be integrated for smart skins for mapping low pressure on three-dimensional surfaces. View Full-Text
Keywords: pressure sensor; fibre Bragg grating; high sensitivity; high durability; soft matrix pressure sensor; fibre Bragg grating; high sensitivity; high durability; soft matrix
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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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Yang, B.; Liu, S.; Wang, X.; Yin, R.; Xiong, Y.; Tao, X. Highly Sensitive and Durable Structured Fibre Sensors for Low-Pressure Measurement in Smart Skin. Sensors 2019, 19, 1811.

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