An experimental study of temperature effect on material parameters of PZT ceramic ring used in knock sensors

Klusáček, Stanislav; Fialka, Jiří; Beneš, Petr; Havránek, Zdeněk

doi:10.1109/icsenst.2013.6727773

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…increase in magnitudes and decrease in frequencies, respectively) in resonance peaks, which are similar to the previous results of a knock sensor. 30 However, for IEP transducer, it seems that the upward shifts are more markedly discernible than lateral shifts for the EMA phase characteristics. The more the heating time is, the more variations of the EMA responses are.…”

Section: Experimental Validation Of the Temperature Effect On The Emamentioning

confidence: 96%

“…These characteristics coincide with the experimental results for a free-free PZT transducer. 23,27–55 Among the thermal-dependent parameters, the compliance coefficient and dielectric permittivity coefficient can be deemed as the most critical factors which accounts for the EMA behaviors, depending on the relations between these parameters and the EMA formula. It is noted that these linear relation between temperature and EMA variations prove to have a number of benefits, including the simplicity in temperature compensation for PZT itself and latter modeling, and an alternative technique for the monitoring of temperature variations in structures.…”

Section: Theoretical Analysis Of Temperature Effect On the Emamentioning

confidence: 99%

“…Similar leftward shifts in the PZT impedance spectrum responding to increased temperature were also observed on the bonded PZT-aluminum beam; 29 however, the magnitudes of the impedance spectrum were found clearly decreased and totally different with that caused by structural damages. Klusacek et al 30 evaluated temperature influence on the impedance and phase of a PZT knock sensor in automotive engines for sensor self-diagnostics. Sepehry et al 31 presented a modeling of a plate structure in impedance method using piezoelectric sensor considering Young’s modulus and density for evaluating temperature effects.…”

Section: Introductionmentioning

confidence: 99%

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Temperature effect on electromechanical admittance–based concrete structural health monitoring

Lin

Luo

et al. 2019

Structural Health Monitoring

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Concrete structures in service are often subjected to environmental/operational temperature effects, which change their inherent properties and also inflict a challenge to their extrinsic monitoring systems. Recently, piezoelectric lead zirconate titanate (PZT)-based electromechanical admittance technique has been increasingly growing into an effective tool for concrete structural health monitoring; however, uncertainty in the changes of monitoring signals induced by temperature impact on concrete/PZT sensor would inevitably cause interference to structural damage detection, which adversely hinder its application from laboratory to engineering practice. This article, aiming at exploring the temperature effect on the electromechanical admittance–based concrete damage evaluation, primarily covered a series of theoretical/numerical analysis with rigorously experimental verifications. Three aspects of comparative studies were performed in theoretical/numerical analysis: (1) thermal-dependent parameters were inclusively evaluated in contribution to the electromechanical admittance characteristics via PZT-structure interaction models; (2) three-dimensional finite element analysis in multi-physics coupled field was employed to qualitatively assess the singular temperature effect on the electromechanical admittance behaviors of free-vibrated PZT, surface-bonded PZT/inside-embedded PZT coupled healthy concrete cubes; and (3) depending on the modeling of surface-bonded PZT-/inside-embedded PZT-cracked concrete cube, thermal effect on damage evaluation was addressed via quantification on the electromechanical admittance variations. In the experimental study, rigorous validation tests were carried out on a group of lab-scale concrete cubes, where surface-bonded PZT/inside-embedded PZT transducers were simultaneously employed for electromechanical admittance monitoring in view of thermal difference between concrete surface and its inner part. Correlation coefficient deviation value-based effective frequency shifts algorithm was also employed to compensate the temperature effect. Moreover, temperature effect was further testified on the monitoring of a full-scale shield-tunnel segment structure. Experimental results indicated that temperature triggered different behaviors of electromechanical admittance signatures for surface-bonded PZT/inside-embedded PZT transducers and contaminated the electromechanical admittance responses for damage detection. Structural damage severity level can be disadvantageously amplified by temperature increment even if under the same damage scenarios.

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Section: Experimental Validation Of the Temperature Effect On The Emamentioning

confidence: 96%