&lt;title&gt;Effects of temperature on the electrical impedance of piezoelectric sensors&lt;/title&gt;

Krishnamurthy, Karthik; Lalande, F.; Rogers, Craig A.

doi:10.1117/12.239033

Cited by 36 publications

(49 citation statements)

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“…The theoretical basis of this method were first proposed by Liang et al (1994) and were then expanded by Zhou et al, Bhalla, Sou, and Anamandas, who proposed 2D and 3D models for dynamic interactions between a structure and its piezoelectric adapters (Krishnamurthy, et al, 1996;Pavelko, et al, 2014;Krishnamurthy, et al, 1996;Annamdas & S., 2007). In addition to the studies on modeling of this method, there have been other researchers who conducted studies on adequacy of this method in detection and evaluation of looseness of bolted structures.…”

Section: Impedance Based Methodsmentioning

confidence: 99%

A Review Paper on Looseness Detection Methods in Bolted Structures

Nikravesh

Goudarzi

2017

Lat. Am. j. solids struct.

116

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Bolted structures are widely utilized in industrial structures and equipment due to the numerous advantages they possess. However, the use of bolts in these structures by itself can cause considerable flaws or damages. One of the major reasons of flaw in such structures is looseness. Since the looseness is initiated with a reduction in the axial force, measurement and estimation of this force can contribute to a healthy performance of the structure. The methods used to measure axial force of bolts are divided into two: those which measure or estimate the force directly and those which, by controlling physical parameters, do this indirectly. Ba-sed on this categorization, this paper examines over 16 methods used for evaluation of axial force of bolted structures, and presents their theoretical bases, drawbacks and advantages, with the litera-ture on each method being discussed separately. Finally, the met-hods are compared and the most important criteria in selecting the methods are introduced.

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Section: Impedance Based Methodsmentioning

confidence: 99%

A Review Paper on Looseness Detection Methods in Bolted Structures

Nikravesh

Goudarzi

2017

Lat. Am. j. solids struct.

116

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“…Krishnamurthy et al suggested a magnitude averaging scheme, which is to calculate the average value of the magnitude assuming a linear relationship between the magnitude and the temperature. [2]. Park et al investigated a temperature compensation scheme in the prospective of damage metric correction.…”

Section: Introductionmentioning

confidence: 99%

A system approach for temperature dependency of impedance-based structural health monitoring

Zhou

Kim

et al. 2009

SPIE Proceedings

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An impedance-based structural health monitoring (SHM) system employs a piezoelectric patch to excite the structure under test and capture its response. Impedance-based SHM offers several advantages over other methods such as good performance for local damage detection and simple hardware. A major problem for impedance-based SHM is temperature dependency. Specifically, baseline impedance profiles of structures vary as the ambient temperature changes. In this paper, we propose a new method to compensate the effect of temperature on baseline profiles. Our method is to select a small subset of baseline profiles for some critical temperatures and estimates the baseline profile for a given ambient temperature through interpolation. We incorporated our method into our SHM system and investigated the effectiveness of our method. Our experimental results show that (i) our method reduces the number of baseline profiles to be stored, and (ii) estimates the baseline profile of a give temperature accurately.

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“…The impedance based damage detection technique is attractive for detecting local structural damage because this technique is sensitive to even small damage and can be applied to complex structures [4][5][6] . However, it has been shown that an impedance signal can also be affected by other ambient variations such as temperature and loading changes, making it susceptible to false alarms due to these non-damage related variations 7,8 . For guided wave based damage detection, specific types of elastic waves called guided waves are generated and measured by various types of transducers including PZTs.…”

Section: Introductionmentioning

confidence: 99%

Integrated impedance and guided wave based damage detection under temperature variation

Sohn

2011

SPIE Proceedings

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Electro-mechanical impedances and guided waves have been widely studied for detecting localized structural damages due to their sensitivity to small structural changes. In this paper, an integrated impedance and guided wave (IIG) based monitoring system is developed to improve the detectability of various damage types under varying temperature. First, a hardware system, called the IIG system, was designed to achieve simultaneous measurements of electro-mechanical impedance and guided wave signals. Then, the effects of temperature on guided waves and electro-mechanical impedances were compensated using the passive imaginary part of the impedance signal. Finally, an automated damage classification algorithm which incorporates temperature compensation was developed. To validate the proposed algorithm, experimental investigations were performed for the detection of bolt loosening and crack in metallic structures subjected to the temperature varying condition, in the range of -20 to 70℃.

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<title>Effects of temperature on the electrical impedance of piezoelectric sensors</title>

Cited by 36 publications

References 0 publications

A Review Paper on Looseness Detection Methods in Bolted Structures

A Review Paper on Looseness Detection Methods in Bolted Structures

A system approach for temperature dependency of impedance-based structural health monitoring

Integrated impedance and guided wave based damage detection under temperature variation

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