Remote structural health monitoring with serially multiplexed fiber optic acoustic emission sensors |
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| Authors: | Chen?Zhongyu Liang?Yujin Email author" target="_blank">Farhad?AnsariEmail author |
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| Institution: | 1. Shanghai Institute for Optics & Fine Mechanics. Shanghai 201800, China
2. Civil & Materials Engineering, Smart Sensors & NDT Laboratory, University of Illinois at Chicago, Chicago, IL 60607 |
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| Abstract: | Development and testing of a serially multiplexed fiber optic sensor system is described. The sensor differs from conventional
fiber optic acoustic systems, as it is capable of sensing AE emissions at several points along the length of a single fiber.
Multiplexing provides for single channel detection of cracks and their locations in large structural systems. An algorithm
was developed for signal recognition and tagging of the AE waveforms for detection of crack locations. Laboratory experiments
on plain concrete beams and post-tensioned FRP tendons were performed to evaluate the crack detection capability of the sensor
system. The acoustic emission sensor was able to detect initiation, growth and location of the cracks in concrete as well
as in the FRP tendons. The AE system is potentially suitable for applications involving health monitoring of structures following
an earthquake
Supported by: National Science Foundation, Grant number CMS-9900338 |
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| Keywords: | acoustic emission crack detection concrete earthquake fiber optic sensors FRP tendon multiplexing post seismic structural health monitoring |
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