Abstract
A compact fiber Bragg grating (FBG) accelerometer based on a hybridization of two cantilever beams is demonstrated. Two FBGs are prestressed and fixed on the combined-beam longitudinal symmetrically. When a vibration is exerted on the accelerometer, the reflection-peaks of two gratings shift sharply in opposite directions without unwanted chirp. Experimental results show that the proposed sensor exhibits a high dynamic sensitivity of 218.4 pm/G and broad frequency range of 10-150 Hz with a wide dynamic range of 0.1 to 3 G. The cross-axis response is 3.2% of the main axis, and the temperature is self-compensated owing to the same responses to temperature of two reflection wavelengths.
| Original language | English |
|---|---|
| Pages (from-to) | 1532-1537 |
| Number of pages | 6 |
| Journal | IEEE Sensors Journal |
| Volume | 15 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1 Mar 2015 |
| Externally published | Yes |
Keywords
- Fiber optics sensors
- fiber Bragg gratings
- vibration measurement