ULTRASONIC FLAW DETECTION APPARATUS AND METHOD FOR DETECTING FLAW OF STEEL PLATE

摘要

Disclosed are an ultrasonic flaw detection apparatus for detecting a flaw of a steel plate and an ultrasonic flaw detection method using the same. The ultrasonic flaw detection apparatus comprises: a spray nozzle that is installed below a steel plate in transit and sprays a medium toward the steel plate to form a medium column; an ultrasonic probe that is installed in the interior of the spray nozzle and transmits/receives ultrasonic waves for detection of a flaw in the steel plate through the medium column; and a medium circulation unit that collects the medium falling from the medium column and circulates the same to the spray nozzle.