Zhuming Cheng, Jie Zeng, Chen Chang, Xuegang Song, Dakai Liang. Structural Impact Localization Based on Optical Fiber Sagnac Sensing Technique[J]. Acta Optica Sinica, 2018, 38(10): 1006004
- Acta Optica Sinica
- Vol. 38, Issue 10, 1006004 (2018)
Fig. 1. Schematic of optical fiber Sagnac sensor
Fig. 2. Schematic of locations of impact points and sensing probes
Fig. 3. Physical devices of impact localization system
Fig. 4. Schematic of time difference-based method
Fig. 5. Impact response signals. (a) Signal of sensor 1; (b) signal of sensor 2
Fig. 6. Signals of de-noising by wavelet transform. (a) Signal of sensor 1; (b) signal of sensor 2
Fig. 7. Reconstructed signals by wavelet transform. (a) Signal of sensor 1; (b) signal of sensor 2
Fig. 8. Wavelet packet energy spectra of impact response signals. (a) Signal energy spectrum of sensor 1; (b) signal energy spectrum of sensor 2
Fig. 9. Time difference of narrow-band signals. (a) Signal of sensor 1; (b) signal of sensor 2
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Table 1. Results of impact localization experiments
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