Abstract
Thermal insulation aerospace composite and metal substrates' bonding defects are tested by the reflection type frequency modulated continuous terahertz wave testing system which the frequency range is 0.23~0.32THz. Thermal insulation composite and metal substrates are bonded by epoxy resin adhesive as the experimental sample. Bonding defects of the adhesive interface can be detected visualized by image neighbor focal plane. Fuzzy c-means (FCM) clustering algorithm is applied to get the segment of defect binary images combined with median filtering, then have the defect area by calculating the number of pixels. Compared with the samples which have known defect area, the error is not more than ±9%.
| Translated title of the contribution | Study on Nondestructive Testing for Bonding Defects in Aerospace Composite Based on Terahertz Image |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 471-475 |
| Number of pages | 5 |
| Journal | Jiliang Xuebao/Acta Metrologica Sinica |
| Volume | 39 |
| Issue number | 4 |
| DOIs | |
| State | Published - 22 Jul 2018 |
| Externally published | Yes |
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