| 摘要 |
<p>An ultrasonic inspection apparatus (10) is adapted for utilizing both pitch/catch and pulse/echo information obtained utilizing a single mode of wave propagation. The apparatus includes an ultrasonic signal transmitting assembly (68, 69 and 70), a signal receiving assembly (99, 100 and 101), a positioning mechanism (14), and an arrangement for recording (16) the information received by the signal receiving assembly. The transmitting assembly (68, 69 and 70) includes at least one source transducer (81) for transmitting shear mode ultrasonic search signals into the mass of an object to be inspected. The signal receiving assembly (99, 100 and 101) receives shear mode ultrasonic catch signals that are produced as the ultrasonic search signals encounter discontinuities in the mass of the object to be inspected and are directed toward and detected by at least one catch transducer (82, 83 and 84). The signal receiving assembly (99, 100 and 101) also receives shear mode ultrasonic echo signals that are directed back to a first source transducer (81).</p> |
