Patent ID: 9157896
Filing Date: 2015-10-13
Classification: G01N

Abstract:
1. An ultrasonic flaw detecting apparatus comprising: a transducer in which a piezoelectric element array for transmitting ultrasonic waves to and receiving echo signals from a test object; an element driving unit for scanning the piezoelectric element array at a predetermined cycle and causing the ultrasonic waves; a synthesizing unit for synthesizing an internal image of the test object based on the echo signals received by the piezoelectric element array; a signal replacing unit for replacing the received echo signal with an echo signal in which a bottom echo of the test object is removed; and a replacement setting unit for comparing the received echo signals with a determined threshold value or determining a maximum peak of the received echo signals and setting a certain range including, around, and exceeding the threshold value or the maximum peak to a range of the bottom echo, wherein the element driving unit adjusts the cycle to prevent multiple reflection of surface echoes from the test object from affecting the internal image.