Impedance-Based Structural Health Monitoring for Temperature Varying Applications.

Park, Gyuhae; Kabeya, Kazuhisa; Cudney, Harley H.; Inman, Daniel J.

doi:10.1299/jsmea.42.249

Cited by 231 publications

(246 citation statements)

References 6 publications

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“…However, when damage was introduced, the temperature made little influence on the qualitative detection result. They [53] also developed a compensation technique to minimise the effects of temperature on impedance measurement. The compensation procedure was based on the reconstruction of the damage metric, which minimised the impedance drifts due to temperature.…”

Section: Electrical Impedance-based Shm Methodmentioning

confidence: 99%

Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures

Sun

Staszewski

Swamy

2010

Advances in Civil Engineering

114

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Structural Health Monitoring (SHM) aims to develop automated systems for the continuous monitoring, inspection, and damage detection of structures with minimum labour involvement. The first step to set up a SHM system is to incorporate a level of structural sensing capability that is reliable and possesses long term stability. Smart sensing technologies including the applications of fibre optic sensors, piezoelectric sensors, magnetostrictive sensors and self-diagnosing fibre reinforced composites, possess very important capabilities of monitoring various physical or chemical parameters related to the health and therefore, durable service life of structures. In particular, piezoelectric sensors and magnetorestrictive sensors can serve as both sensors and actuators, which make SHM to be an active monitoring system. Thus, smart sensing technologies are now currently available, and can be utilized to the SHM of civil engineering structures. In this paper, the application of smart materials/sensors for the SHM of civil engineering structures is critically reviewed. The major focus is on the evaluations of laboratory and field studies of smart materials/sensors in civil engineering structures.

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Section: Electrical Impedance-based Shm Methodmentioning

confidence: 99%

Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures

Sun

Staszewski

Swamy

2010

Advances in Civil Engineering

114

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“…Techniques have been developed to make impedance measurements insensitive to temperature variation (Koo et al 2007;Park 1999). Impedance is traditionally measured for laboratory experiments with a bulky and expensive impedance analyzer but Peairs et al developed a low-cost method for measuring impedance (2004).…”

Section: Impedance-based Structural Health Monitoringmentioning

confidence: 99%

Impedance-based structural health monitoring of wind turbine blades

2007

Self Cite

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Wind power is a fast-growing source of non-polluting, renewable energy with vast potential. However, current wind technology must be improved before the potential of wind power can be fully realized. One of the key components in improving wind turbines is their blades. Blade failure is very costly because blade failure can damage other blades, the wind turbine itself, and possibly other wind turbines. A successful structural health monitoring (SHM) system incorporated into wind turbines could extend blade life and allow for less conservative designs.Impedance-based SHM is a method which has shown promise on a wide variety of structures. The technique utilizes small piezoceramic (PZT) patches attached to a structure as self-sensing actuators to both excite the structure with high-frequency excitations, and monitor any changes in structural mechanical impedance. By monitoring the electrical impedance of the PZT, assessments can be made about the integrity of the mechanical structure. Recent advances in hardware systems with onboard computing, including actuation and sensing, computational algorithms, and wireless telemetry, have improved the accessibility of the impedance method for in-field measurements.The feasibility of implementing impedance-based SHM on wind turbine blades is investigated in this work. Experimentation was performed to determine the capability of the method to detect damage on blades. First, tests were run to detect both indirect and actual forms of damage on a section of an actual wind turbine blade provided by Sandia National Laboratories.Additional tests were run on the same blade section using a high-frequency response function method of SHM for comparison. Finally, based on the results of the initial testing, the impedance method was utilized in an attempt to detect damage during a fatigue test of an experimental wind turbine blade at the National Renewable Energy Laboratory's National Wind Technology Center.iii ACKNOWLEDGEMENTS

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“…The piezoelectric coupling constant and complex Young modulus also result in baseline shift but their effect on the overall impedance is much smaller than that of the dielectric constant. The use of a modified RMSD metric, which compensates for frequency-wise and amplitude-wise shifts of the impedance function in order to minimize the temperature-induced drifts, is presented in the work of Park et al (1999) and showed good results. Many experiments from various case studies have shown that the real part of the electromechanical impedance is sensitive enough to detect damage and other changes in the structure features than the magnitude or the imaginary part, as seen in the work of Finzi Neto et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Architecture of a remote impedance-based structural health monitoring system for aircraft applications

Martins¹,

Neto²,

Steffen³

et al. 2012

J. Braz. Soc. Mech. Sci. & Eng.

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Impedance-Based Structural Health Monitoring for Temperature Varying Applications.

Cited by 231 publications

References 6 publications

Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures

Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures

Impedance-based structural health monitoring of wind turbine blades

Architecture of a remote impedance-based structural health monitoring system for aircraft applications

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