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Sector Piezoelectric Sensor Array Transmitter Beamforming MUSIC Algorithm Based Structure Damage Imaging Method.

Tao Fu1, Yi Wang2, Lei Qiu2

  • 1Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China.

Sensors (Basel, Switzerland)
|March 1, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a new structural health monitoring method using sector piezoelectric sensor arrays and a multiple signal classification algorithm. This approach enhances damage localization accuracy in structures with high damping and complex shapes.

Keywords:
elastic wavemultiple signal classification algorithmsensor arraystructural health monitoringtransmitter beamforming

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Area of Science:

  • Structural Health Monitoring
  • Non-Destructive Testing
  • Wave Propagation

Background:

  • Elastic-wave-based structural health monitoring (SHM) offers sensitive, regional monitoring capabilities.
  • Traditional SHM methods struggle with damage localization in structures featuring high damping and specific geometries due to sensor limitations and low signal-to-noise ratios.

Purpose of the Study:

  • To develop an advanced damage monitoring technique for improved localization accuracy in challenging structural environments.
  • To overcome the limitations of existing methods in structures with large damping and complex shapes.

Main Methods:

  • Proposed a novel damage monitoring method utilizing a sector piezoelectric sensor array combined with the multiple signal classification (MSC) algorithm.
  • Implemented dual sector piezoelectric sensor arrays tailored for specific structures to capture and synthesize multi-excitation source scattering signals.
  • Enhanced signal-to-noise ratios through signal synthesis.

Main Results:

  • Successfully verified the method's effectiveness in locating damage within a circular bonded structure with a metal ring.
  • Demonstrated superior damage localization performance compared to traditional single-excitation MSC, path imaging, and delay-sum imaging techniques.
  • Achieved significantly higher localization accuracy.

Conclusions:

  • The proposed sector piezoelectric sensor array and MSC-based method significantly improves damage localization accuracy.
  • This technique is particularly effective for SHM in structures with large damping and complex shapes, overcoming limitations of conventional approaches.