Title :
Two-channel inclinometer based on low-coherence fiber-optic Mach-Zehnder interrogation technique
Author_Institution :
Dept. of Phys., Harbin Eng. Univ., China
Abstract :
A two-channel inclinometer based on the gravity-referenced rotation fiber optic sensing system is demonstrated. It measures the angle variations between a nominally vertical reference line in the civil structure and the direction of gravity. By using low-coherence fiber optic Mach-Zehnder interferometric technique, the rotations sensitivity in the two perpendicular vertical planes can be achieved in the 0.2´ with the dynamics range of ±5°.
Keywords :
Mach-Zehnder interferometers; angular measurement; fibre optic sensors; intelligent structures; Mach-Zehnder interferometric technique; angle variation measurement; civil structure; fiber optic sensing system; fiber optic sensor; gravity direction; gravity-referenced rotation; low-coherence fiber-optic techique; perpendicular vertical plane; rotation sensitivity; smart structure; two-channel inclinometer; vertical reference line; Intelligent structures; Lenses; Light emitting diodes; Optical coupling; Optical fiber couplers; Optical fiber sensors; Optical fibers; Optical interferometry; Optical sensors; Stimulated emission;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1278924
