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Impact Response of a Cantilever Beam Measured by Optical Fiber Sensors

Authors:
Shiuh-Chuan Her
Hsi-Wen Hou

Keywords: optical fiber sensor; Mach-Zehnder interferometer; dynamic strain; 3 × 3 coupler.

Abstract:
Mach-Zehnder interferometric technology combined with optical fiber sensor allows the direct measurement of the impact response of a cantilever beam. The difference in the optical path due to the strain induces a relative phase shift in the Mach-Zehnder interferometer. A 3 × 3 coupler is used to demodulate the phase shift of the Mach-Zehnder interferometer. Experimental results show that the optical fiber sensor is capable of measuring the dynamic strain of a cantilever beam impacted by a hammer. The impact responses measured by the optical fiber sensor are in good agreement with the strain gauge. The proposed optical fiber sensor is simple, inexpensive and easy to implement; moreover, it is highly reliable and accurate.

Pages: 35 to 37

Copyright: Copyright (c) IARIA, 2016

Publication date: April 24, 2016

Published in: conference

ISSN: 2519-836X

ISBN: 978-1-61208-523-4

Location: Venice, Italy

Dates: from April 24, 2016 to April 28, 2016