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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Scale transform signal processing for optimal ultrasonic temperature compensation.

Joel B Harley¹, José M F Moura

¹Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA, USA. jharley@ece.cmu.edu

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|November 13, 2012

Summary

This study introduces a faster method for temperature compensation in structural health monitoring using guided waves. The new approach improves computational speed for accurate system error reduction.

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Area of Science:

Engineering
Materials Science
Signal Processing

Background:

Temperature changes can introduce significant errors in structural health monitoring systems.
Existing temperature compensation methods for guided wave systems often lack computational efficiency.

Purpose of the Study:

To develop a novel, computationally efficient methodology for temperature compensation in guided wave structural health monitoring.
To present and evaluate algorithms that improve processing speed for optimal temperature compensation.

Main Methods:

A new methodology for optimal, stretch-based temperature compensation was developed.
The approach operates on signals within the stretch factor and scale-transform domains.
Three distinct algorithms for temperature compensation were demonstrated.

Main Results:

The proposed algorithms exhibit improved computational speed compared to existing optimal methods.
Performance was validated using experimental guided wave data.
The methodology effectively reduces systemic errors caused by temperature variations.

Conclusions:

The presented stretch-based methodology offers a computationally efficient solution for temperature compensation in guided wave systems.
This advancement can lead to more reliable and faster structural health monitoring.
The developed algorithms provide a practical tool for real-world applications.