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Dynamic strain measured by Mach-Zehnder interferometric optical fiber sensors.

Her SC, Yang CM - Sensors (Basel) (2012)

Bottom Line: Optical fibers possess many advantages such as small size, light weight and immunity to electro-magnetic interference that meet the sensing requirements to a large extent.A 3 × 3 coupler is employed to demodulate the phase shift of the Mach-Zehnder interferometer.The experimental results are validated with the strain gauge.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Yuan Ze University, Chung-Li 320, Taiwan. mesch@saturn.yzu.edu.tw

ABSTRACT
Optical fibers possess many advantages such as small size, light weight and immunity to electro-magnetic interference that meet the sensing requirements to a large extent. In this investigation, a Mach-Zehnder interferometric optical fiber sensor is used to measure the dynamic strain of a vibrating cantilever beam. A 3 × 3 coupler is employed to demodulate the phase shift of the Mach-Zehnder interferometer. The dynamic strain of a cantilever beam subjected to base excitation is determined by the optical fiber sensor. The experimental results are validated with the strain gauge.

No MeSH data available.


Related in: MedlinePlus

Comparison of the demodulated phase shift and exact phase shift.
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f5-sensors-12-03314: Comparison of the demodulated phase shift and exact phase shift.

Mentions: Substituting the numerical data of the three outputs from Figure 4 into Matlab software, follows the process as shown in the block diagram of Figure 3 to demodulate the phase shift. Figure 5 illustrates the results of phase shift demodulated by Matlab, and compares with the exact phase shift Equation (12). It appears that the demodulated phase shift is almost the same as the exact phase shift.


Dynamic strain measured by Mach-Zehnder interferometric optical fiber sensors.

Her SC, Yang CM - Sensors (Basel) (2012)

Comparison of the demodulated phase shift and exact phase shift.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376560&req=5

f5-sensors-12-03314: Comparison of the demodulated phase shift and exact phase shift.
Mentions: Substituting the numerical data of the three outputs from Figure 4 into Matlab software, follows the process as shown in the block diagram of Figure 3 to demodulate the phase shift. Figure 5 illustrates the results of phase shift demodulated by Matlab, and compares with the exact phase shift Equation (12). It appears that the demodulated phase shift is almost the same as the exact phase shift.

Bottom Line: Optical fibers possess many advantages such as small size, light weight and immunity to electro-magnetic interference that meet the sensing requirements to a large extent.A 3 × 3 coupler is employed to demodulate the phase shift of the Mach-Zehnder interferometer.The experimental results are validated with the strain gauge.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Yuan Ze University, Chung-Li 320, Taiwan. mesch@saturn.yzu.edu.tw

ABSTRACT
Optical fibers possess many advantages such as small size, light weight and immunity to electro-magnetic interference that meet the sensing requirements to a large extent. In this investigation, a Mach-Zehnder interferometric optical fiber sensor is used to measure the dynamic strain of a vibrating cantilever beam. A 3 × 3 coupler is employed to demodulate the phase shift of the Mach-Zehnder interferometer. The dynamic strain of a cantilever beam subjected to base excitation is determined by the optical fiber sensor. The experimental results are validated with the strain gauge.

No MeSH data available.


Related in: MedlinePlus