Systems and methods for generating ultrasonic waves, exciting special classes of ultrasonic transducers and ultrasonic devices for engineering measurements

摘要: Embodiments include an electromagnetic acoustic transducer (EMAT) system. The EMAT system includes a plurality of magnets and conductor set. has like pole arrangement wherein each magnet is in close proximity to one another. set electrically conductive elements. A portion the positioned proximate magnets. are test object. configured perform at least generating receiving elastic wave. also method wave measurement for nondestructive testing evaluation. steps positioning object, such that propagates about detecting propagating analyzing difference character between step evaluate