Open AccessInvestigation of low frequency fibre Bragg grating accelerometer based on thermoplastic cantilever beam
Author(s) -
Z. M. Hafizi,
E. Vorathin
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1078/1/012012
Subject(s) - accelerometer , shaker , cantilever , natural frequency , materials science , acceleration , vibration , acoustics , sensitivity (control systems) , beam (structure) , fiber bragg grating , thermoplastic , optics , computer science , composite material , electronic engineering , optoelectronics , engineering , physics , wavelength , classical mechanics , operating system
Vibration measurement technique is very important in structural integrity monitoring. Various fibre Bragg grating (FBG) based accelerometers have been developed for vibration measurement. However, most of the researchers focused on high frequency monitoring and only few reported works are based on low frequency measurement. Therefore, this paper presented a low frequency FBG accelerometer based on Polyphenylene Ether (PPE) thermoplastic cantilever beam. The proposed FBG accelerometer was attached to a shaker and vibration signals were given with variations in frequency and acceleration. As a result, the FBG accelerometer has a sensitivity of 110 pm/g and natural frequency of 9 Hz. The proposed accelerometer capable to detect low frequency of 2 Hz at 0.04 g which is suitable for utilisation in seismic monitoring of earthquake.