Overview of Piezoelectric Impedance-Based Health Monitoring and Path Forward

Park, Gyuhae; Sohn, Hoon; Farrar, Charles R.; Inman, Daniel J.

doi:10.1177/05831024030356001

Cited by 860 publications

(663 citation statements)

References 52 publications

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“…Thermocouples were used to determine the exact temperature at the surface of the specimens. The experimental setup used to realize the impedance measurements consists of a high speed data acquisition system, a waveform generator, a circuit able to measure both the voltage applied to the piezoelectric element and the resulting current [1,3,32], and a laptop. The whole experimental setup can be seen on Fig.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The most common metrics for damage detection using the EM signature are based on the analysis of the resistance R( f ) [1,3,27,28]. Let R ref ( f ) be the resistance in the reference healthy case and R unk ( f ) the resistance in the current unknown state.…”

Section: Electromechanical (Em) Signatures and Associated Metricsmentioning

confidence: 99%

“…In the past decades, electromechanical (EM) signature techniques have gained importance in the structural health monitoring community [1][2][3][4]. The EM signature technique consists of measuring the EM signature (real or imaginary part of the impedance or admittance as a function of frequency) of a piezoelectric sensor which is mounted on a host structure in order to pinpoint incipient damages that may appear on the structure (damage detection) or to detect any defect on the sensor itself (sensor diagnostics).…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous Influence of Static Load and Temperature on the Electromechanical Signature of Piezoelectric Elements Bonded to Composite Aeronautic Structures

Rébillat

Guskov

Balmès

et al. 2016

Journal of Vibration and Acoustics

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Electromechanical (EM) signature techniques have raised a huge interest in the structural health monitoring community. These methods aim at assessing structural damages and sensors degradation by analyzing the EM responses of piezoelectric components bonded to aeronautic structures. These structures are subjected simultaneously to static loads and temperature variations that affect the metrics commonly used for damage detection and sensor diagnostics. However, the effects of load and temperature on these metrics have mostly been addressed separately. This paper presents experimentations conducted to investigate the simultaneous influence of static load and temperature on these metrics for two kinds of piezoelectric elements (PZT: lead zirconate titanate, and MFC: macro fiber composite) bonded on sandwich composite materials, for the full range of real-life conditions encountered in aeronautics. Results obtained indicate that both factors affect the metrics in a coupled manner in particular due to the variations of the mechanical properties of the bonding layer when crossing its glass transition temperature. Furthermore, both piezoelectric elements globally behave similarly when subjected to temperature variations and static loads. Simultaneous accounting of both temperature and static load is thus needed in practice in order to design reliable structural health monitoring systems based on these metrics. IntroductionIn the past decades, electromechanical (EM) signature techniques have gained importance in the structural health monitoring community [1][2][3][4]. The EM signature technique consists of measuring the EM signature (real or imaginary part of the impedance or admittance as a function of frequency) of a piezoelectric sensor which is mounted on a host structure in order to pinpoint incipient damages that may appear on the structure (damage detection) or to detect any defect on the sensor itself (sensor diagnostics). In an aeronautic context, temperature variations as well as static loads induced on the structure during a flight can both be very important. Experiments have been carried out that focused on temperature [5][6][7][8][9][10][11][12][13][14][15][16][17] or static loads [18][19][20][21][22], but rarely simultaneously [23][24][25][26]. Regarding temperature effects, it has been observed that the effect of temperature changes consists of a shift of the piezoelectric resonance frequencies. It has also been shown that higher temperature increases the apparent capacitive value of the bonded piezoelectric patch. Regarding the effect of static loads, it has been shown that the magnitude of the peaks and valleys of the EM signature decreases with an increase of applied loads and that natural frequencies shift proportionally with the applied load. Regarding the influence of both temperature and static loads, a strategy has been designed by Lim et al. [23] to compensate for their effects and Zhu et al. [24,25] and Xu et al. [26] analyzed experimentally both effects, but in a separate manner.This...

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Electromechanical (Em) Signatures and Associated Metricsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simultaneous Influence of Static Load and Temperature on the Electromechanical Signature of Piezoelectric Elements Bonded to Composite Aeronautic Structures

Rébillat

Guskov

Balmès

et al. 2016

Journal of Vibration and Acoustics

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“…With impedance measurements, "a frequency range higher than 200-kHz is found to be favorable in localizing the sensing, while a frequency range lower than 70-khz covers a larger sensing area." (Park, et al 2003) With pipeline structures, therefore, the impedance methods can be used to detect local damage if a sufficiently high frequency range is chosen.…”

Section: Testing Parameters Involved With Impedance Methodsmentioning

confidence: 99%

Pipeline Structural Health Monitoring Using Macro-fiber Composite Active Sensors

Thien

2006

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The United States economy is heavily dependent upon a vast network of pipeline systems to transport and distribute the nation's energy resources. As this network of pipelines continues to age, monitoring and maintaining its structural integrity remains essential to the nation's energy interests. Numerous pipeline accidents over the past several years have resulted in hundreds of fatalities and billions of dollars in property damages. These accidents show that the current monitoring methods are not sufficient and leave a considerable margin for improvement. To avoid such catastrophes, more thorough methods are needed.As a solution, the research of this thesis proposes a structural health monitoring (SHM) system for pipeline networks. By implementing a SHM system with pipelines, their structural integrity can be continuously monitored, reducing the overall risks and costs associated with current methods. The proposed SHM system relies upon the deployment of macro-fiber composite (MFC) patches for the sensor array. Because MFC patches are flexible and resilient, they can be permanently mounted to the curved surface of a pipeline's main body. From this location, the MFC patches are used to monitor the structural integrity of the entire pipeline.Two damage detection techniques, guided wave and impedance methods, were implemented as part of the proposed SHM system. However, both techniques utilize the same MFC patches. This dual use of the MFC patches enables the proposed SHM system to require only a single sensor array. The presented Lamb wave methods demonstrated the ability to correctly identify and locate the presence of damage in the main body of the pipeline system, including simulated cracks and actual corrosion damage. The presented impedance methods demonstrated the ability to correctly identify and locate the presence of damage in the flanged joints of the pipeline system, including the loosening of bolts on the flanges. In addition to damage to the actual pipeline itself, the proposed methods were used to demonstrate the capability of detecting deposits inside of pipelines. Monitoring these deposits can prevent clogging and other hazardous situations.Finally, suggestions are made regarding future research issues which are needed to advance this research. Because the research of this thesis has only demonstrated the feasibility of the techniques for such a SHM system, these issues require attention before any commercial applications can be realized.

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“…서 론 지난 20년간 압전웨이퍼를 이용한 보의 건전성감시 기법에 대한 연구가 지속적으로 진행되어 왔다 (Park et al, 2003;Raghavan and Cesnik, 2007). (Park et al, 2003).…”

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Estimating High-Frequency Damping of a Beam through Electro-Mechanical Signatures of Piezoelectric Wafer Mounted on the Beam

Shin¹,

Park²

2017

Journal of The Korean Society of Civil Engineers

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The high-frequency electro-mechanical signatures, which are excited and received by piezoelectric wafers mounted on a beam, are sensitive to incipient defect in a beam. Predicting the sensing range of the piezoelectric wafers is needed to effectively conduct damage assessment of a beam through utilizing their advantage. Damping of a beam plays the most important role in determining the sensing range among other features. This paper has proposed a scheme for estimating high-frequency damping of a beam through electro-mechanical signatures of piezoelectric wafers mounted on the beam. Considering damping effect while resonance of a beam evolves, wave perspective is adopted to formulate the electro-mechanical signatures of piezoelectric wafers. The damping of a beam is estimated through the least squares method minimizing the difference between the calculated and the measured damping ratio function values which are obtained from formulated and measured electro-mechanical signatures, respectively. The validity of the proposed scheme has been demonstrated through numerical and experimental examples using an aluminum beam with collocated piezoelectric wafers.

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Overview of Piezoelectric Impedance-Based Health Monitoring and Path Forward

Cited by 860 publications

References 52 publications

Simultaneous Influence of Static Load and Temperature on the Electromechanical Signature of Piezoelectric Elements Bonded to Composite Aeronautic Structures

Simultaneous Influence of Static Load and Temperature on the Electromechanical Signature of Piezoelectric Elements Bonded to Composite Aeronautic Structures

Pipeline Structural Health Monitoring Using Macro-fiber Composite Active Sensors

Estimating High-Frequency Damping of a Beam through Electro-Mechanical Signatures of Piezoelectric Wafer Mounted on the Beam

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