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Structural Deflection Monitoring Using an Embedded ETDR Distributed Strain Sensor.

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Title: Structural Deflection Monitoring Using an Embedded ETDR Distributed Strain Sensor.
Authors: Lin, Mark W.1 lin@mae.uah.edu, Thaduri, Jagan1
Source: Journal of Intelligent Material Systems & Structures. May2006, Vol. 17 Issue 5, p423-430. 8p. 1 Black and White Photograph, 3 Diagrams, 2 Charts, 6 Graphs.
Subjects: Deformations (Mechanics), Detectors, Structural frames, Girders, Bending (Metalwork), Engineering instruments
Abstract: Feasible application of the electrical time domain reflectometry (ETDR) technique for distributed strain measurement is investigated in this study. A prototype coaxial ETDR distributed strain sensor is embedded into a laboratory-scale reinforced concrete beam specimen, and three-point bending tests are conducted. The ETDR signal waveforms of the embedded sensor are used to determine the deflection profiles of the beam under various bending loads. The resulting deflection profiles are validated by their good agreements with the deflection measurements by LVDT displacement sensors at four discrete locations. It is shown that the ETDR distributed sensing technique has the capability to capture the variation of the load-induced axial strain along the sensing line. In addition, the ETDR distributed sensor could also clearly capture the location of localized high strain points. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Intelligent Material Systems & Structures is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 20814297
AccessLevel: 6
PubType: Academic Journal
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  Data: Structural Deflection Monitoring Using an Embedded ETDR Distributed Strain Sensor.
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Mark+W%2E%22">Lin, Mark W.</searchLink><relatesTo>1</relatesTo><i> lin@mae.uah.edu</i><br /><searchLink fieldCode="AR" term="%22Thaduri%2C+Jagan%22">Thaduri, Jagan</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Intelligent+Material+Systems+%26+Structures%22">Journal of Intelligent Material Systems & Structures</searchLink>. May2006, Vol. 17 Issue 5, p423-430. 8p. 1 Black and White Photograph, 3 Diagrams, 2 Charts, 6 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Detectors%22">Detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+frames%22">Structural frames</searchLink><br /><searchLink fieldCode="DE" term="%22Girders%22">Girders</searchLink><br /><searchLink fieldCode="DE" term="%22Bending+%28Metalwork%29%22">Bending (Metalwork)</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering+instruments%22">Engineering instruments</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Feasible application of the electrical time domain reflectometry (ETDR) technique for distributed strain measurement is investigated in this study. A prototype coaxial ETDR distributed strain sensor is embedded into a laboratory-scale reinforced concrete beam specimen, and three-point bending tests are conducted. The ETDR signal waveforms of the embedded sensor are used to determine the deflection profiles of the beam under various bending loads. The resulting deflection profiles are validated by their good agreements with the deflection measurements by LVDT displacement sensors at four discrete locations. It is shown that the ETDR distributed sensing technique has the capability to capture the variation of the load-induced axial strain along the sensing line. In addition, the ETDR distributed sensor could also clearly capture the location of localized high strain points. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Intelligent Material Systems & Structures is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1177/1045389X06058631
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        Text: English
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        PageCount: 8
        StartPage: 423
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      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Detectors
        Type: general
      – SubjectFull: Structural frames
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      – SubjectFull: Girders
        Type: general
      – SubjectFull: Bending (Metalwork)
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      – SubjectFull: Engineering instruments
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      – TitleFull: Structural Deflection Monitoring Using an Embedded ETDR Distributed Strain Sensor.
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              Text: May2006
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              Y: 2006
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