METHOD FOR DETECTING DEFECTS OF OBJECT TO BE INSPECTED BY USING ULTRASONIC WAVE AND DEFECT DETECTING SYSTEM USING THE SAME

摘要

PURPOSE: A method for detecting defects of an object to be inspected by using an ultrasonic wave and a defect detecting system using the same are provided to easily detect defects by using the ultrasonic wave and to decrease a time required for detecting defects by automatically performing defect detecting procedures. CONSTITUTION: A method for detecting defects of an object to be inspected by using an ultrasonic wave comprises the steps of projecting ultrasonic pulses to the object to be inspected and receiving ultrasonic pulses reflected from the object to be inspected. Pattern information of the received ultrasonic pulses is converted into signals recognized by a computer(9). Predetermined parameter values are extracted from the converted signals by means of the computer. A reference value is compared with the extracted parameter values in order to determine whether or not defects exist.