A fully self‐powered, natural‐light‐enabled fiber‐optic vibration sensing solution
Jiaqi Wang,
Ho‐Yin Man,
Cuiling Meng,
Pengcheng Liu,
Shaoxin Li,
Hoi‐Sing Kwok,
Yunlong Zi
Affiliations
Jiaqi Wang
School of Marine Sciences Sun Yat‐Sen University Zhuhai Guangdong P. R. China
Ho‐Yin Man
Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Shatin, N.T. Hong Kong P. R. China
Cuiling Meng
State Key Laboratory on Advanced Displays and Optoelectronics Technologies The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong P. R. China
Pengcheng Liu
State Key Laboratory on Advanced Displays and Optoelectronics Technologies The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong P. R. China
Shaoxin Li
Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing P. R. China
Hoi‐Sing Kwok
State Key Laboratory on Advanced Displays and Optoelectronics Technologies The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong P. R. China
Yunlong Zi
Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Shatin, N.T. Hong Kong P. R. China
Abstract 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.
