Patent ID: 6092420
Filing Date: 2000-07-25
Classification: G01N,G01S

Abstract:
An ultrasonic flaw detection apparatus comprising:a probe which transmits an ultrasonic pulse at an angle with respect to a test surface of a test object and receives said ultrasonic pulse, which has been reflected by an acoustically discontinued portion in said test object, as an echo;scanning means for scanning said probe over a predetermined scanning zone on said test object and outputting a spatial position of said probe; anddetecting means whichaccepts and stores said echo from said probe, and accepts and stores a spatial position of said probe from said scanning means, anddetects said acoustically discontinued portion according to the spatial position of said probe and said echo, considering the spread of an ultrasonic beam attributable to diffraction so that values for multiple propagation paths between an origin and a reconstruction point are combined to indicate said acoustically discontinued portion,wherein said probe is driven by a transmission signal to transmit said ultrasonic pulse at a transmitting angle with respect to a test surface of a test object, and receives said ultrasonic pulse, which has been reflected by an acoustically discontinued portion in said test object, as an echo at a receiving angle, which is different from said transmitting angle, with respect to said test surface.