Structural health monitoring using smart sensors

Sivagami, A.; Jayakumar, S.; Kandavalli, Michael Angelo

doi:10.1063/5.0026292

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Similarly, in other studies, advanced computer processing is avoided to construct a cost-effective system, and simple processing is performed within the microcontroller. For instance, in [ 50 ], the processing is carried out in the microcontroller. If the threshold values are exceeded, a message is sent to a mobile device through a global system for mobile communication (GSM) module to inform the user about the state of the structure.…”

Section: Structural Health Monitoring Systemsmentioning

confidence: 99%

A Systematic Review of Structural Health Monitoring Systems to Strengthen Post-Earthquake Assessment Procedures

López-Castro

Haro

Arcos-Avilés

et al. 2022

Sensors

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Structural health monitoring (SHM) is vital to ensuring the integrity of people and structures during earthquakes, especially considering the catastrophic consequences that could be registered in countries within the Pacific ring of fire, such as Ecuador. This work reviews the technologies, architectures, data processing techniques, damage identification techniques, and challenges in state-of-the-art results with SHM system applications. These studies use several data processing techniques such as the wavelet transform, the fast Fourier transform, the Kalman filter, and different technologies such as the Internet of Things (IoT) and machine learning. The results of this review highlight the effectiveness of systems aiming to be cost-effective and wireless, where sensors based on microelectromechanical systems (MEMS) are standard. However, despite the advancement of technology, these face challenges such as optimization of energy resources, computational resources, and complying with the characteristic of real-time processing.

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Section: Structural Health Monitoring Systemsmentioning

confidence: 99%

A Systematic Review of Structural Health Monitoring Systems to Strengthen Post-Earthquake Assessment Procedures

López-Castro

Haro

Arcos-Avilés

et al. 2022

Sensors

View full text Add to dashboard Cite

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“…A previous study physically mixed CNTs with silver particles [ 28 ], while another using chemical methods produced AgNP-modified CNTs [ 29 ], resulting in improved electrical properties and a high gauge factor (GF) sensitivity with the results being two times better than for CNTs. Conventionally, strain sensor networks require wires to connect each individual strain sensor to a centralized data acquisition unit; however, this causes measurement limitations, high maintenance costs, and reductions in spatial resolution [ 30 , 31 , 32 ]. Thus, the fabrication of wireless sensors with a wireless communication channel is preferred and expected to offer unique advantages, such as installation flexibility, reduced weight, improved sensor density, and ease of maintenance [ 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

A Screen-Printed Metal Hybrid Composite for Wireless Wind Sensing

Xue

Lim

2022

Nanomaterials

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Wind sensing has become a key component in various fields with the growing trend of assessing air conditions for energy conversion. In this study, we demonstrated a wireless screen-printable flexible strain sensor system based on Ag/MWCNT composite for wind sensing. To achieve high printability with the metal hybrid composite for the fabrication of a screen-printed flexible sensor, we systematically investigated the rheological properties, resulting in the high shear thinning and thixotropic behavior of the composite. After confirming the suitability for screen printing, we investigated the performance of the printed strain sensor, obtaining a gauge factor (G.F.) of 2.08 with 90% sensitivity and high durability after 6000 bending cycles. In addition, the sensor showed 98% temperature sensitivity during a wind sensing test due to the intrinsic properties of the metal hybrid composite. In an application based on an IoT system, we verified that the response of the wireless sensor corresponded with that of a wired sensor, indicating the expansion of low-cost, mass-produced screen-printed wind sensors.

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Calculation of Voltages Ensuring Trouble-Free Operation of an Electrostatic Meter of the Direction of Small Angle Tilts

Пщелко

Tsareva

2022

Izv. vysš. učebn. zaved. Ross., Radioèlektron.

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Introduction. Periodic geodetic observations are used to control the position of building structures and soil massifs. Since tilt is considered to be one of the most dangerous types of building deformations, this paper considers existing methods for its determination. When a horizontal displacement (tilt) is detected, it is of particular importance to assess not so much its angle but its direction. This allows preventive measures to be timely enforced. Therefore, determination of the direction of horizontal displacements at small tilt angles presents a relevant research problem. In order to increase the sensitivity of the considered measuring device, it is proposed to use the action of electric field.Aim. Calculation of electrical voltages that ensure reliable operation of the device under consideration, depending on its geometric dimensions and characteristics of the materials used.Materials and methods. The device was made of conductive, semiconductive and dielectric materials. Calculations were based on an analysis of forces acting on a vertically suspended load in the presence of electric field. The conditions of equilibrium and instability of the position of the load arising due to strong positive feedback in electric field were considered.Results. Calculations were performed to support a reasonable choice of geometric and electrophysical characteristics of the developed device. A formula was obtained for the values of electrical voltages that could ensure troublefree operation of the device. The calculated values of operating voltages were found to be acceptable for practical application. The main structural elements of the device and one of the possible methods for registering information signals were proposed.Conclusion. Due to the instable position of the load in a sufficiently strong electric field, the developed device allows the direction of displacements to be measured even when their values tend to zero. This makes the developed device promising for practical application. However, it should be noted that, under such small displacements, the accuracy of the device depends on the manufacturing conditions and random factors.

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Structural health monitoring using smart sensors

Cited by 3 publications

References 14 publications

A Systematic Review of Structural Health Monitoring Systems to Strengthen Post-Earthquake Assessment Procedures

A Systematic Review of Structural Health Monitoring Systems to Strengthen Post-Earthquake Assessment Procedures

A Screen-Printed Metal Hybrid Composite for Wireless Wind Sensing

Calculation of Voltages Ensuring Trouble-Free Operation of an Electrostatic Meter of the Direction of Small Angle Tilts

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