A fully self-powered, natural-light-enabled fiber-optic vibration sensing solution

SusMat

article

Jiaqi Wang¹  Ho-Yin Man²  Cuiling Meng³  Pengcheng Liu³  Shaoxin Li⁴  Hoi-Sing Kwok³  Yunlong Zi² 

[1] School of Marine Sciences, Sun Yat-Sen University;Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong;State Key Laboratory on Advanced Displays and Optoelectronics Technologies, The Hong Kong University of Science and Technology;Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences

关键词: fiber-optics;    liquid crystal;    self-powered sensing;    triboelectric nanogenerators;    vibration sensing;   

DOI  :  10.1002/sus2.31

学科分类：电力

来源: Wiley

【 摘 要 】

Fiber-optic sensors have been developed to monitor the structural vibration with advantages of high sensitivity, immunity to electromagnetic interference (EMI), flexibility, and capability to achieve multiplexed or distributed sensing. However, the current fiber-optic sensors require precisely polarized coherent lasers as the lighting sources, which are expensive in cost and suffer from the power supply issues while operating at outdoor environments. This work aims at solving these issues, through developing a fully self-powered, natural-light-enabled approach. To achieve that, a spring oscillator-based triboelectric nanogenerator (TENG), a polymer network liquid crystal (PNLC), and an optical fiber were integrated. The external vibration drove the PNLC to switch its transparency, allowing the variation of the incident natural light in the optical fiber. Compared with the majority of conventional TENG-based active vibration sensors, the developed paradigm does not suffer from the EMI, without requirements of the signal preamplification which consumes additional energy. The vibration displacement monitoring was performed to validate the sensing effectiveness of the developed paradigm.

【 授权许可】

CC BY