Electric Time Domain Reflectometry Sensors for Non-Invasive Structural Health Monitoring of Glass Fiber Composites

Pandey, Gaurav; Thostenson, Erik T.; Heider, Dirk

doi:10.2528/pier13020611

Cited by 15 publications

(9 citation statements)

References 23 publications

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“…The micro fiber Fabry–Perot interferometer (FPI) sensor with the advantages of compact structure [1], anti-electromagnetic interference [2], and high sensitivity [3] has taken the leading role in a large number of sensing applications such as strain, high sensitive temperature, high sensitive pressure and so on [4,5,6]. It has been widely used in biomedical, non-destructive health monitoring and other fields; among them, the Fabry–Perot (FP) can be effectively used in the optical fiber tip for a limited space environment.…”

Section: Introductionmentioning

confidence: 99%

A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

Yan

Gui

Wang

et al. 2017

Sensors

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A high-sensitivity, low-cost, ultrathin, hollow fiber micro bubble structure was proposed; such a bubble can be used to develop a high-sensitivity strain sensor based on a Fabry–Perot interferometer (FPI). The micro bubble is fabricated at the fiber tip by splicing a glass tube to a single mode fiber (SMF) and then the glass tube is filled with gas in order to expand and form a micro bubble. The sensitivity of the strain sensor with a cavity length of about 155 μm and a bubble wall thickness of about 6 μm was measured to be up to 8.14 pm/με.

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Section: Introductionmentioning

confidence: 99%

A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

Yan

Gui

Wang

et al. 2017

Sensors

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“…Reflectometry has been used to detect faults in electrical systems [1][2][3][4], including photovoltaic (PV) systems [5]. Classical analysis of reflectometry for transmission lines considers symmetric systems where an impedance occurs on both lines of a symmetric twin-lead transmission line.…”

Section: Introductionmentioning

confidence: 99%

Reflectometry on Asymmetric Transmission Line Systems

Saleh¹,

Harley²,

Jayakumar³

et al. 2020

PIER M

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Time domain reflectometry is frequently used to localize faults in electrical systems. Most existing literature on reflectometry in transmission lines considers symmetric faults that are either shorts between the two conductors or open circuits where both conductors are disconnected at the same location. This paper investigates spread spectrum time domain reflectometry (SSTDR) applied to asymmetric twin-lead transmission lines in which either only one conductor is disconnected, or the reflectometry instrument itself is asymmetric. For asymmetric faults, we observe not only the expected dominant reflection corresponding to the location of the disconnection, but also an additional reflection from the end of the transmission line. In the second case, we leverage the asymmetric response of the SSTDR instrument to identify which of the two otherwise identical conductors has been disconnected.

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“…Nowadays, damage detection gets ahead throughout the civil, mechanical and aerospace engineering communities [1][2][3]. For civil engineers, it is caused by increasing demands on safety and reduction of maintenance cost [4][5].…”

Section: Introductionmentioning

confidence: 99%

Impact analysis of input parameter for damage detection code

Venglár

Sokol

2017

MATEC Web Conf.

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Abstract. The primary aim of the article is to analyse impact of appropriate values of input parameter for an effective solution of the self-developed code used for damage detection. The code was prepared to determine the change of bending stiffness in Microsoft Office Excel Visual Basic for Applications. The code used non-destructive vibration based method, i.e. the FE model updating method. A steel bar was assumed for numerical calculation. Time consumption of calculation, precision of identification and degree of possible damage detection were investigated. The values of computation time depend on the input values, the desired limit of the accepted error. Then, data from a laboratory experiment was analysed. The damage detection was done in accordance with the suitable input data from a parametric study of the steel bar.

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Electric Time Domain Reflectometry Sensors for Non-Invasive Structural Health Monitoring of Glass Fiber Composites

Cited by 15 publications

References 23 publications

A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

Reflectometry on Asymmetric Transmission Line Systems

Impact analysis of input parameter for damage detection code

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