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

Sensors

Rong Yin¹  Xi Wang²  Bao Yang³  Xiaoming Tao³  Su Liu³  Ying Xiong³ 

[1] Apparel Technology, Ministry of Education, College of Information Science and Technology, Donghua University, Shanghai 201620, China;;Engineering Research Center of Digitized Textile &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;

关键词: pressure sensor;    fibre Bragg grating;    high sensitivity;    high durability;    soft matrix;   

DOI  :  10.3390/s19081811

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown