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Locating acoustic emission with an amplitude-multiplexed acoustic sensor array based on a modified mach-zehnder
Applied Optics
|March 28, 2008
Summary
This study introduces an amplitude-division-multiplexed interferometric sensor array for precise acoustic emission location. Preliminary tests achieved centimeter-level accuracy in one dimension, with potential for 2D and 3D extension.
Area of Science:
- Physics
- Engineering
- Materials Science
Background:
- Acoustic emission (AE) is crucial for structural health monitoring.
- Accurate AE source localization is challenging but vital for damage assessment.
- Interferometric sensors offer high sensitivity for detecting subtle wave propagation.
Purpose of the Study:
- To develop and demonstrate an amplitude-division-multiplexed interferometric sensor array for AE source localization.
- To evaluate the system's accuracy in one-dimensional localization.
- To explore the system's scalability for multi-dimensional AE location.
Main Methods:
- Utilized a modified Mach-Zehnder interferometer configuration.
- Employed an amplitude-division-multiplexing scheme for sensor integration.
- Configured the initial system with two sensing arms and one reference arm.
Main Results:
- Achieved a one-dimensional location accuracy of a few centimeters in preliminary experiments.
- Demonstrated the feasibility of using interferometric arrays for AE detection.
- Validated the principle of amplitude-division multiplexing for sensor enhancement.
Conclusions:
- The developed sensor array shows promise for accurate AE source localization.
- The system's modular design allows for straightforward extension to 2D and 3D localization.
- This technology can significantly advance structural health monitoring and non-destructive testing applications.
