Design of visualization systems for terahertz non destructive testing

In order to improve the validity and reliability of terahertz non destructive testing (NDT), a set of visualization system for terahertz NDT was set up. Terahertz frequency modulation continuous wave imaging devices was adopted to collect data, MATLAB-graphical user interface (GUI) was used to develop a set of visualization software platform integrating function such as image processing and 3-D reconstruction. After the analysis of the data, the prototype system was used to detect polymer insulation tiles with the containing of internal metal. The results show that the terahertz NDT visualization system is constructed to observe the internal structure of polymer insulation tile effectively, and then by using the internal image of software platform, after reasonable analysis and algorithm processing, the size and shape of the embedded metal defects are displayed directly on the computer. The accuracy of non-destructive testing is increased, and the difficulty of terahertz nondestructive testing and data analysis duration are decreased.