| 摘要 |
<p>A DEVICE FOR DESTRUCTION-FREE TESTING OF FERROMAGNETIC COMPONENT WALLS WITH RESPECT TO ELONGATE DEFECTS HAS A SENDING TRANSDUCER (4, 20, 21) THAT EXCITES ULTRASOUND WAVES IN A WALL AREA OF A FERROMAGNETIC COMPONENT WALL MAGNETIZED IN A PREDETERMINED DIRECTION OF MAGNETIZATION. THE ULTRASOUND WAVES PROPAGATE ON A PATH (17) ORIENTED BY THE SENDING TRANSDUCER (4, 20, 21). A RECEIVING TRANSDUCER (9, 10, 14, 22, 23, 28) RECEIVES THE ULTRASOUND WAVES AT A SPACING FROM THE SENDING TRANSDUCER (4, 20, 21). THE CONFIGURATION OF THE SENDING TRANSDUCER (4, 20, 21) AND A HIGH FREQUENCY EMITTED BY THE SENDING TRANSDUCER (4,20, 21), WHICH HIGH FREQUENCY IS TO BE DETERMINED BASED ON A THICKNESS OF THE FERROMAGNETIC COMPONENT WALL, ARE SELECTED SO AS TO EFFECT EXCITATION OF HORIZONTAL SHEAR WAVES OF HIGHER ORDER. THE PATH ORIENTATION IS SELECTED AT A SLANT ANGLE TO THE PREDETERMINED DIRECTION OF MAGNETIZATION. THE RECEIVING TRANSDUCER (9, 10, 14, 22, 23, 28) IS POSITIONED LATERAL TO THE PATH (17) AND IS ORIENTED TOWARD A PREDETERMINED TESTING AREA OF THE WALL SECTION IN THE PATH (17).</p> |
