Enhancement of microwave nondestructive testing method for the inspection of pipes by optimizing the microwave probe profile
佐々木 幸太 Kota SASAKI 遊佐 訓孝 Noritaka YUSA 若井 隆純 Takashi WAKAI 橋爪 秀利 Hidetoshi HASHIZUME
finite-element simulation microwave nondestructive testing pipe diameter pipe wall thinning
Abstract: This study reports the development of a new microwave probe for the nondestructive testing of a pipe. Three-dimensional finite element simulations are carried out to optimize the profile of a microwave probe, whose results show that a probe with elliptic profile enables smaller reflection at the probes as well as much better single-mode propagation inside the pipe than conventional ones. Experimental validations are carried out using a straight brass pipe with an inner diameter of 39 mm and a total length of 2 m. The results of the experiments clearly demonstrate that the new microwave probe provides clearer signals due to simulated rectangular wall thinning.