Simulation of Ultrasonic Fields and Echo Signals using Cross-Section Photograph of Test Object and FDTD Method
We present a simulation technique of ultrasonic fields and echo signals, that uses a digitized crosssection photograph of a test object and a digitized cross-section figure of an ultrasonic probe as input data. The input data file is referred to as a shape file. In the shape file, different colors are assigned to different materials, for example, red for a piezoelectric transducer, green for the wedge of a probe, and blue for a test object, for the purpose of distinguishing between the different materials. Each color contains information on material parameters, such as the velocity of a longitudinal wave in the material, that of a shear wave, and the material density. Using the shape file, ultrasonic transmitted fields, scattered fields, and echo signals are calculated by a two-dimensional elastic finite-difference time domain (FDTD) method. The pixel size of the shape file is set to be the same as the grid size used in the FDTD simulation. A simulation result using real photographs of butt weld joints is presented.
Simulation FDTD method Ultrasonic fields Echo signal Shape file
Tomonori KIMURA Koichiro MISU Mitsuhiro KOIKE Shusou WADAKA
Mitsubishi Electric Corporation 5-1-1 Ofuna, Kamakura, Japan Ryoden Shonan Electronics Corporation 25 Yamasaki, Kamakura, Japan
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
1312-1317
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）