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Terahertz Multiple Echoes Correction and Non-Destructive Testing Based on Improved Wavelet Multi-Scale Analysis.

Weihua Xiong^1,2,3, Lijuan Li^1,2,3, Jiaojiao Ren^1,2,3

¹School of Optoelectronics Engineering, Changchun University of Science and Technology, Changchun 130000, China.

Sensors (Basel, Switzerland)

|May 20, 2022

Summary

This summary is machine-generated.

This study introduces an improved wavelet multi-scale analysis to correct multiple echoes in terahertz (THz) non-destructive testing (NDT). The method enhances image quality and ensures accurate defect detection for reliable THz NDT results.

Keywords:

multi-scale analysis multiple echoes non-destructive testing time-of-flight

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Area of Science:

Materials Science
Physics
Engineering

Background:

Terahertz (THz) non-destructive testing (NDT) is crucial for material analysis.
Multiple echoes in THz NDT cause signal distortion, impacting accuracy.
Existing echo correction methods may lose critical signal information.

Purpose of the Study:

To develop an improved wavelet multi-scale analysis for correcting multiple echoes in THz NDT.
To enhance signal information retention compared to existing methods.
To improve the accuracy and reliability of THz NDT results.

Main Methods:

An improved wavelet multi-scale analysis technique was developed.
The method leverages the frequency properties of multiple echoes.
The technique was applied to correct echo signals in THz NDT.

Main Results:

The improved wavelet multi-scale analysis significantly enhanced image continuity and smoothness (at least twofold).
The method effectively prevented misjudgments in identifying characteristic defects.
Accurate detection results were ensured, validating the technique's efficacy.

Conclusions:

The improved wavelet multi-scale analysis is a significant advancement for THz NDT.
This method ensures accurate evaluation of THz NDT results by preserving signal integrity.
It offers a more reliable approach for defect detection and thickness measurements.