Fault Detection of a Rotating Shaft by Using the Electromechanical Impedance Method and a Temperature Compensation Approach

Rabelo, Diogo de Souza; Tsuruta, Karina Mayumi; Oliveira, D. D. de; Cavalini, Aldemir Ap; Neto, Roberto Mendes Finzi; Steffen, Valder

doi:10.1007/s10921-017-0405-9

Cited by 25 publications

(22 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the changes in the natural frequencies of the monitored structure, the temperature also changes the properties of the piezoelectric material of the transducer. Regarding the EMI method, the main parameters that vary with the temperature are the piezoelectric constant d 31 and the dielectric constant (ε 33 T ) . In general, both the piezoelectric constant and the dielectric constant increase in magnitude with increasing temperature [26,27], changing the electromechanical coupling factor k 31 2 implicit in (3), given by…”

Section: Temperature Effects On the Emi Methodsmentioning

confidence: 99%

“…Although the EFS method is simple, the study presented in [6] verified that its efficiency decreases if a wide frequency range is used to calculate the damage indices, since the frequency deviation is not constant, increasing with the raising of the excitation frequency. In [33], the authors used a hybrid method to compensate for the effects of frequency and amplitude deviation, enabling the damage detection even in environments with varying temperature.…”

Section: Temperature Effects On the Emi Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Feature extraction approach insensitive to temperature variations for impedance‐based structural health monitoring

Campos

Castro

Budoya

et al. 2019

IET Science, Measurement & Technology

View full text Add to dashboard Cite

Section: Temperature Effects On the Emi Methodsmentioning

confidence: 99%

Section: Temperature Effects On the Emi Methodsmentioning

confidence: 99%

Feature extraction approach insensitive to temperature variations for impedance‐based structural health monitoring

Campos

Castro

Budoya

et al. 2019

IET Science, Measurement & Technology

View full text Add to dashboard Cite

“…However, due to the ceramic nature of the conventional PZT ceramics, the brittle property makes them vulnerable to breakage and the difficulty in attaching it onto curved surfaces cannot be ignored. For this reason, various authors [ 30 , 31 , 32 , 33 , 34 , 35 ] have investigated using macro-fiber composite (MFC) created from NASA Langley Research Center [ 36 ]. MFC transducer consists of multiple layers of adhesive, interdigitated electrodes and polyimide film where piezoelectric materials are sandwiched between.…”

Section: Applying the Emi Techniquementioning

confidence: 99%

A Review of the Piezoelectric Electromechanical Impedance Based Structural Health Monitoring Technique for Engineering Structures

Baek

2018

Sensors

247

153

View full text Add to dashboard Cite

The birth of smart materials such as piezoelectric (PZT) transducers has aided in revolutionizing the field of structural health monitoring (SHM) based on non-destructive testing (NDT) methods. While a relatively new NDT method known as the electromechanical (EMI) technique has been investigated for more than two decades, there are still various problems that must be solved before it is applied to real structures. The technique, which has a significant potential to contribute to the creation of one of the most effective SHM systems, involves the use of a single PZT for exciting and sensing of the host structure. In this paper, studies applied for the past decade related to the EMI technique have been reviewed to understand its trend. In addition, new concepts and ideas proposed by various authors are also surveyed, and the paper concludes with a discussion of the potential directions for future works.

show abstract

“…Z A and Z S represent the electromechanical impedance of PZT and the structure, respectively. Assuming that the mechanical properties of the PZT patch do not vary during the measurement procedure, Equation (1) shows that the electrical impedance of the PZT patch is directly related to the structure’s impedance [ 47 ]. Axial force causes changes in the structure’s mechanical impedance, thus changing local dynamic features.…”

Section: Smart Aggregate (Sa) and The Electromechanical Impedance mentioning

confidence: 99%

Influence of Axial Load on Electromechanical Impedance (EMI) of Embedded Piezoceramic Transducers in Steel Fiber Concrete

Wang

Chen

Zheng

et al. 2018

Sensors

View full text Add to dashboard Cite

With the advantages of high tensile, bending, and shear strength, steel fiber concrete structures have been widely used in civil engineering. The health monitoring of concrete structures, including steel fiber concrete structures, receives increasing attention, and the Electromechanical Impedance (EMI)-based method is commonly used. Structures are often subject to changing axial load and ignoring the effect of axial forces may introduce error to Structural Health Monitoring (SHM), including the EMI-based method. However, many of the concrete structure monitoring algorithms do not consider the effects of axial loading. To investigate the influence of axial load on the EMI of a steel fiber concrete structure, concrete specimens with different steel fiber content (0, 30, 60, 90, 120) (kg/m3) were casted and the Lead Zirconate Titanate (PZT)-based Smart Aggregate (SA) was used as the EMI sensor. During tests, the step-by-step loading procedure was applied on different steel fiber content specimens, and the electromechanical impedance values were measured. The Normalized root-mean-square deviation Index (NI) was developed to analyze the EMI information and evaluate the test results. The results show that the normalized root-mean-square deviation index increases with the increase of the axial load, which clearly demonstrates the influence of axial load on the EMI values for steel fiber concrete and this influence should be considered during a monitoring or damage detection procedure if the axial load changes. In addition, testing results clearly reveal that the steel fiber content, often at low mass and volume percentage, has no obvious influence on the PZT’s EMI values. Furthermore, experiments to test the repeatability of the proposed method were conducted. The repeating test results show that the EMI-based indices are repeatable and there is a great linearity between the NI and the applied loading.

show abstract

Fault Detection of a Rotating Shaft by Using the Electromechanical Impedance Method and a Temperature Compensation Approach

Cited by 25 publications

References 17 publications

Feature extraction approach insensitive to temperature variations for impedance‐based structural health monitoring

Feature extraction approach insensitive to temperature variations for impedance‐based structural health monitoring

A Review of the Piezoelectric Electromechanical Impedance Based Structural Health Monitoring Technique for Engineering Structures

Influence of Axial Load on Electromechanical Impedance (EMI) of Embedded Piezoceramic Transducers in Steel Fiber Concrete

Contact Info

Product

Resources

About