Bibliographic Details
| Title: |
Real Aperture Continuous Terahertz Imaging System and Spectral Refinement Method |
| Authors: |
Kailiang Xue, Wenna Zhang, Zhaoba Wang, Yong Jin, Xin Guo, Youxing Chen |
| Source: |
Photonics, Vol 10, Iss 9, p 1020 (2023) |
| Publisher Information: |
MDPI AG, 2023. |
| Publication Year: |
2023 |
| Collection: |
LCC:Applied optics. Photonics |
| Subject Terms: |
terahertz imaging, FMCW, non-destructive testing, spectral refinement, Applied optics. Photonics, TA1501-1820 |
| More Details: |
In order to meet the increasing demand of non-destructive testing (NDT) in engineering practice, a continuous terahertz NDT platform based on linear scanning has been developed, with a center frequency of 154 GHz and a bandwidth of 56 GHz. This system combines frequency modulation continuous wave (FMCW) radar technology with a continuous scanning structure, as well as a data acquisition platform to provide a non-contact detection method; this is highly efficient and compensates for the shortcomings of traditional methods such as microwave, X-ray, ultrasonic, and others in safety inspection and special detection. In addition, a signal processing method of spectral refinement and correction is proposed in this paper for accurate thickness measurement. The results show that the method has a high accuracy for ABS, PVC, and ceramic matrix composites. By extracting the characteristic parameters, the detection and imaging of prefabricated defects, such as debonding and bubbles in composite materials, have been successfully achieved. This helps to evaluate the internal state of the inspected object more intuitively and further meets the requirements of industrial NDT. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2304-6732 |
| Relation: |
https://www.mdpi.com/2304-6732/10/9/1020; https://doaj.org/toc/2304-6732 |
| DOI: |
10.3390/photonics10091020 |
| Access URL: |
https://doaj.org/article/a0349faa836f4805a72794c3b53697f8 |
| Accession Number: |
edsdoj.0349faa836f4805a72794c3b53697f8 |
| Database: |
Directory of Open Access Journals |
