Li Sun, Xingye Wang, Chuang Li, Chunwei Zhang. New Double Fiber Bragg Grating Static Level Based on Equal Strength Beams[J]. Acta Optica Sinica, 2021, 41(14): 1406005
- Acta Optica Sinica
- Vol. 41, Issue 14, 1406005 (2021)
Fig. 1. Working principle diagram of static level
Fig. 2. Schematic diagram of principle of single fiber Bragg grating static level before settlement
Fig. 3. Schematic diagram of principle of single fiber Bragg grating static level after settlement
Fig. 4. Equal strength cantilever beams and fiber Bragg grating
Fig. 5. Schematic diagram of double fiber Bragg grating static level before settlement
Fig. 6. Schematic diagram of double fiber Bragg grating static level after settlement
Fig. 7. Structural design drawing of double fiber Bragg grating static level
Fig. 8. Exploded assembly drawing of leak-proof connecting device
Fig. 9. Vernier caliper as height ruler, and physical drawing of equal strength cantilever beams. (a) Vernier caliper as height ruler; (b) physical drawing of equal strength cantilever beams
Fig. 10. Calibration test of double fiber Bragg grating static level
Fig. 11. Relationship between sum of positive travel wavelength variation values of three groups and settlement variation, and fitting curve
Fig. 12. Relationship between sum of reverse travel wavelength variation values of three groups and settlement variation, and fitting curve
Fig. 13. Engineering application of double fiber Bragg grating static level
Fig. 14. Monitoring curve of uneven settlement between two columns
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Table 1. Linearity error of double fiber Bragg grating static level
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Table 2. Hysteresis error of double fiber Bragg grating static level
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Table 3. Standard deviation data
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