Abstract
A fiber Bragg grating (FBG) sensing based triaxial vibration sensor has been presented in this paper. The optical fiber is directly employed as elastomer, and the triaxial vibration of a measured body can be obtained by two pairs of FBGs. A model of a triaxial vibration sensor as well as decoupling principles of triaxial vibration and experimental analyses are proposed. Experimental results show that: sensitivities of 86.9 pm/g, 971.8 pm/g and 154.7 pm/g for each orthogonal sensitive direction with linearity are separately 3.64%, 1.50% and 3.01%. The flat frequency ranges reside in 20–200 Hz, 3–20 Hz and 4–50 Hz, respectively; in addition, the resonant frequencies are separately 700 Hz, 40 Hz and 110 Hz in the x/y/z direction. When the sensor is excited in a single direction vibration, the outputs of sensor in the other two directions are consistent with the outputs in the non-working state. Therefore, it is effectively demonstrated that it can be used for three-dimensional vibration measurement.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 24214-24229 |
| Number of pages | 16 |
| Journal | Sensors |
| Volume | 15 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 2015 |
| Externally published | Yes |
Bibliographical note
Funding Information:Project supported by the National Natural Science Foundation of China (Grant No. 61301064) and the Key Program of Natural Science Foundation of Hubei Province of China (Grant No. 2014CFA100).
Publisher Copyright:
© © 2015 by the authors; licensee MDPI, Basel, Switzerland.
Keywords
- fiber Bragg grating
- triaxial
- vibration sensor