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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.


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Three outputs of the 3 × 3 coupler with excitation frequency of 7 Hz.
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f7-sensors-12-03314: Three outputs of the 3 × 3 coupler with excitation frequency of 7 Hz.

Mentions: The cantilever beam is excited by a shaker with the frequency of 7 Hz which is approximate to the first natural frequency of 7.37 Hz. Figure 7 shows the signals of the three outputs of the 3 × 3 coupler.


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

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

Three outputs of the 3 × 3 coupler with excitation frequency of 7 Hz.
© Copyright Policy
Related In: Results  -  Collection

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

f7-sensors-12-03314: Three outputs of the 3 × 3 coupler with excitation frequency of 7 Hz.
Mentions: The cantilever beam is excited by a shaker with the frequency of 7 Hz which is approximate to the first natural frequency of 7.37 Hz. Figure 7 shows the signals of the three outputs of the 3 × 3 coupler.

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