A METHOD AND APPARATUS FOR INSPECTING A PRODUCT WITH ULTRASOUND

摘要

A method of inspecting a product with ultrasound, which method comprises the steps of: (a) transmitting ultrasonic waves into the product with a transducer means such that they are internally reflected from a first surface, a second surface, and from an end of the product; (b) receiving ultrasonic waves reflected from the end of the product and from any defects in the first and second surfaces; (c) generating a position signal representative of the position of the transducer means with respect to said end; (d) using said position signal to enable inspection of substantially the entire first surface of the product, while continuing to inspect the second surface of the product; and (e) thereafter disregarding any indication of a defect in said first surface while using said position signal to enable inspection of substantially the entire second surface of the product.