Journal
JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS
Volume 2, Issue -, Pages -Publisher
EUROPEAN OPTICAL SOC
DOI: 10.2971/jeos.2007.07013
Keywords
Terahertz imaging; non-destructive testing; quality control; weld joint; plastics
Categories
Funding
- Federal Ministry of Education and Research [FKZ: 13N8572]
Ask authors/readers for more resources
We present the first investigation of plastic weld joints using terahertz waves. Terahertz time-domain spectroscopy clearly reveals contaminations like metal or sand within the weld joint of two high-density polyethylene sheets. Furthermore, areas can be identified where the welding process has failed and the parts to be joined are separated by a small air gap. We show that a three layer structure of polyethylene-air-polyethylene has a characteristic, frequency-dependent transmission behaviour. This allows for a distinction between welded and non-welded material as well as for the calculation of the air layer thickness from the relative transmission spectrum. Consequently, terahertz time-domain spectroscopy provides a promising new non-destructive and even contactless technique, which is desired by the plastics industry for detecting a variety of deviations from the ideal welding process. [DOI:10.2971/jeos.2007.07013]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available