Abstract
An equal strength cantilever beam vibration sensor based on an excessively tilted fiber grating (Ex-TFG) with light intensity demodulation is proposed. The basic principles and sensing characteristics of vibration sensing of an equal strength cantilever beam and Ex-TFG, the combination of which is applied into vibration sensing, are analyzed. An Ex-TFG is attached to the middle axis of an equal strength cantilever beam. As the vibration of a piezoelectric ceramic causes the equal strength cantilever beam to deform, the same and uniform deformation also occurs on the Ex-TFG. Experimental results show that when the thickness of the equal strength cantilever beam is 0.3 mm and the Ex-TFG is at transverse electric (TE) polarization state, the sensing performance is the best, with the maximum acceleration sensitivity reaching 81.065 mv·m−1·s281.065 mv·m−1·s2, and the fast Fourier transform (FFT) main frequency components of the sensing signal accounting for more than 80%. In addition, this sensor is stable in sensing performance, easy in demodulation, simple in structure, high in sensitivity, and easy in manufacture, applicable for the sensing and on-line monitoring of low-frequency vibration signals.
Original language | English |
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Pages (from-to) | 2128 |
Journal | Applied Optics |
Volume | 57 |
Issue number | 9 |
Early online date | 14 Feb 2018 |
DOIs | |
Publication status | Published - 14 Mar 2018 |
Bibliographical note
Funding: National Natural Science Foundation of China (NSFC) (61505017); Science and Technology Research Program of Chongqing Municipal Education Commission (KJ1709192, KJ1709211)Keywords
- Fiber optics sensors
- Remote sensing and sensors
- Fiber Bragg gratings