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Related Concept Videos

Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Atomic Emission Spectroscopy: Instrumentation01:22

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Related Experiment Video

Updated: Apr 3, 2026

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
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One sensor acoustic emission localization in plates.

R Ernst1, F Zwimpfer1, J Dual1

  • 1Institute of Mechanical Systems, Swiss Federal Institute of Technology, ETH Zurich, Switzerland.

Ultrasonics
|September 16, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a novel single-sensor method for localizing acoustic emission sources in plates. By utilizing time reversal and wave dispersion, it accurately identifies damage origins without multiple sensors.

Keywords:
Acoustic emissionMindlin plateSource characterizationStructural health monitoringTime reversal

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Area of Science:

  • Structural Health Monitoring
  • Acoustic Emission Analysis
  • Wave Propagation Physics

Background:

  • Acoustic emissions (AE) are crucial for monitoring structural integrity, detecting damage via elastic waves.
  • Traditional AE localization relies on trilateration, necessitating at least three sensors in a 2D plane.
  • Existing methods face limitations in sensor count and complexity for precise source identification.

Purpose of the Study:

  • To develop a single-sensor technique for identifying and localizing acoustic emission sources in finite plates.
  • To leverage the time reversal principle and the dispersive properties of flexural waves for AE analysis.
  • To overcome the limitations of traditional multi-sensor AE localization methods.

Main Methods:

  • Employing the time reversal principle combined with the dispersive nature of flexural wave modes.
  • Utilizing numerical time reversal simulations to analyze transverse velocity response signals.
  • Analyzing the time reversal process for infinite Mindlin plates and validating with 3D Finite Element Method (FEM) simulations.

Main Results:

  • A novel acoustic emission localization process was developed through combined theoretical analysis and FEM simulation.
  • Experimental verification using artificially generated acoustic emissions (Hsu-Nielsen source) on aluminum plates.
  • Achieved good and reliable source localization in a homogeneous quadratic aluminum plate using only one sensor.

Conclusions:

  • The proposed single-sensor time reversal method effectively localizes acoustic emission sources in plates.
  • This technique offers a simplified and potentially more cost-effective approach to structural health monitoring.
  • Demonstrated the practical feasibility and reliability of the method through experimental validation.