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Related Concept Videos

Zones of Protection01:16

Zones of Protection

In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...

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RETRACTED: Thiyagarajan, J.S. Non-Destructive Testing Mechanism for Pre-Stressed Steel Wire Using Acoustic Emission Monitoring. <i>Materials</i> 2020, <i>13,</i> 5029.

Materials (Basel, Switzerland)·2025
Same author

RETRACTED: Non-Destructive Testing Mechanism for Pre-Stressed Steel Wire Using Acoustic Emission Monitoring.

Materials (Basel, Switzerland)·2020
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Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units.

Himanshi Gayakwad1, Jothi Saravanan Thiyagarajan1

  • 1School of Infrastructure, Indian Institute of Technology Bhubaneswar, Argul, Khordha 752050, Odisha, India.

Sensors (Basel, Switzerland)
|March 26, 2022
PubMed
Summary

Smart sensing units (SSU) using Lead Zirconate Titanate (PZT) and the electromechanical impedance (EMI) technique effectively detect damage in concrete structures. Combining EMI with wave propagation (EMI-WP) enhances detection of both near-field and far-field structural damage.

Keywords:
COMSOL multiphysicsconcreteconductancedamage detectionembedded sensorimpedancepiezoelectric sensor

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Area of Science:

  • Materials Science
  • Civil Engineering
  • Structural Health Monitoring

Background:

  • Lead Zirconate Titanate (PZT) sensors are crucial for structural health monitoring (SHM) via the electromechanical impedance (EMI) technique.
  • Concrete structure vibrations during casting impact conductance signatures, necessitating robust damage detection methods.
  • Smart sensing units (SSU), comprising PZT, adhesive, and steel, offer high sensitivity to structural changes.

Purpose of the Study:

  • To investigate the impact of embedded SSUs on damage detection in concrete structures.
  • To evaluate the effectiveness of combining EMI with wave propagation (EMI-WP) for SHM.
  • To enhance the capability of SSU patches for detecting both local and remote structural damage.

Main Methods:

  • Utilized the electromechanical impedance (EMI) technique to obtain conductance signatures in the 10-500 kHz range.
  • Implemented numerical simulations using COMSOL multiphysics to analyze wave propagation in damaged and undamaged concrete beams.
  • Employed a five-cycle sine burst modulated by a Hanning window as the transient excitation signal for wave propagation analysis.

Main Results:

  • Numerical simulations quantified damage by analyzing changes in received voltage signals and time of flight (TOF).
  • The combined EMI-WP technique demonstrated improved effectiveness in detecting both near-field and far-field damage.
  • Experimental validation confirmed the proposed methodology's efficacy in SHM for concrete structures.

Conclusions:

  • The integrated EMI-WP approach significantly enhances the damage detection capabilities of SSU patches.
  • This combined technique provides a more comprehensive solution for monitoring the structural integrity of concrete elements.
  • The study validates the EMI-WP method as a powerful tool for advanced structural health monitoring.