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- W2006367249 abstract "A single mode fiber optic vibration senor is designed and demonstrated to monitor the vibration of a simplysupported beam. A rectangular beam (length 30.8 cm, width 2.5cm and thickness 0.5mm) made of spring-steel isarranged as simply supported beam and is made to vibrate periodically. To sense the vibrations a telecommunicationfiber is chemically etched such that its diameter reaches 50μm and is glued using an epoxy at the centre of the beam. Abroadband light (1550nm) is launched into Fiber Bragg Grating (FBG) through a circulator. The light reflected by theFBG (1540.32nm) is coupled into the centre etched fibre through the circulator and is detected by photodiode connectedto a transimpedance amplifier. The electrical signal is logged into the computer through NI-6016 DAQ. The sensorworks on transmission power loss due to the mode volume mismatch and flexural strain (field strength) of the fiber dueto the bending in the fiber with respect to the bending of the spring-steel beam. The beam is made to vibrate and thecorresponding intensity of light is recorded. Fast Fourier transform (FFT) technique is used to measure the frequencies ofvibration. The results show that this sensor can sense vibration of low frequency accurately and repeatability is high. Thesensor has high linear response to axial displacement of about 0.8 mm with sensitivity of 32mV/10μm strain. This lowcostsensor may find a place in industry to monitor the vibrations of the beam structures and bridges." @default.
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- W2006367249 date "2012-04-23" @default.
- W2006367249 modified "2023-09-23" @default.
- W2006367249 title "An etched fiber optic vibration sensor to monitor the simply supported beam" @default.
- W2006367249 doi "https://doi.org/10.1117/12.922176" @default.
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