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Fiber Optic Sensors for Smart Materials and StructuresIn this paper we describe recently developed fiber sensors which are capable of monitoring the health of smart-structures. The unobstrusive geometry of these sensors make them an excellent choice for embedding the sensor in composite materials to measure internal states of strain in structures and materials. Some of these sensors have gage lengths that can be tailored from tens of microns to many meters. We will describe various demodulation schemes (Pseudo-Heterodyne, Synthetic-Heterodyne, Homodyne, Differential-Cross Multiplier, and Single Channel Phase-Tracker) to obtain high bandwidth measurements, enabling measurement of static to high frequency impact generated strains with a dynamic response exceeding tens of thousands of microstrains. In addition, we will show that we can tailor the fiber sensor to either measure only strain and reject temperature response or measure only the temperature, or measure both temperature and strain simultaneously. We will also demonstrate the ability to measure multiple strain components inside a host simultaneously using a single fiber sensor embedded in the host using a certain sensor type and transverse strain immunity using another sensor type. Additionally we will show the ability to measure temperature up to 100 C using fiber optic sensors.
Document ID
19960047679
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Singh, H.
(Maryland Univ. College Park, MD United States)
Chang, C. C.
(Maryland Univ. College Park, MD United States)
Boyer, T.
(Maryland Univ. College Park, MD United States)
Sirkis, J. S.
(Maryland Univ. College Park, MD United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1996
Publication Information
Publication: Proceedings of the 4th Annual Workshop: Advances in Smart Materials for Aerospace Applications
Subject Category
Optics
Accession Number
96N33289
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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