Image Reconstruction of Phased Ultrasonic Guided Wave Testing for Storage Tank Floor Defect

The method of utilizing the control method of phased array was discussed. An arrayed longitudinal wave probe was controlled to enhance the excitation energy. Viable probe layouts were presented according to different size of inspection area. In order to improve the sensitivity of receiving signals, digital focusing method was adopted and the equation for image reconstruction was presented. The experiment showed that it was viable using this equation to locate the defect position and determine its size.