Abstract:
This thesis presents detecting metal cracks through Singularity Expansion Method to analyze the signal which is scattered from an object. In these simulations, the plane wave is transmitted to incident to an object. The late-time portion of a transient response scattered from object is used to extract poles by using Short-time Matrix Pencil Method. The poles were extracted that can analyze the behavior of cracks on the metal structure through using Chipless RFID which is economical and high temperature resistant. Metal cracks is simulated by CST Microwave Studio program at non-crack metal and metal cracks width at 1 mm, 2mm, 3mm to determine changing pole value and compare width of increased cracks. Then we tested the real metal cracks at non-crack metal and metal cracks width at 1 mm, 2mm, 3mm. The result show that identification of metal cracks can specify the width of cracks. This method is a non-destructive testing on the metal and accurately detection. Moreover, this method also economize cost more other cracks detecting methods.