NONCONTACT-TYPE THICKNESS MEASURING METHOD AND DEVICE OF IN-LIQUID STEEL STRUCTURE

PROBLEM TO BE SOLVED: To provide a noncontact type thickness measuring method and a device of an in-liquid steel structure having low cost and high reliability, capable of realizing continuous thickness measurements of the in-liquid steel structure, without having to remove the adhesives adhering to the in-liquid steel structure. SOLUTION: An ultrasonic transducer 51 is arranged separately in a noncontact state to the in-liquid steel structure 53 which is a measuring object, ultrasonic waves are radiated from the ultrasonic transducer 51 to the in-liquid steel structure 53, and reflected waves reflected from the in-liquid steel structure 53 are received by the ultrasonic transducer 51, and the received reflected wave is subjected to correlation processing, to thereby extract a front-surface reflected wave from the front surface of the in-liquid steel structure 53 and rear-surface reflected waves from the rear surface of the in-liquid steel structure 53. The thickness of the in-liquid steel structure 53 can be calculated, by determining the difference of each arrival time to the ultrasonic transducer 51 between the front-surface reflected waves and the rear-surface reflected waves. COPYRIGHT: (C)2009,JPO&INPIT