| 摘要 |
An ultrasonic detection and locating method and device based on TOFD and a phased array. The device comprises a TOFD detection unit (10) and a phased array detection unit (20). The TOFD detection unit (10) is used for scanning welded seams by using a TOFD ultrasonic detection method, so as to determine the position of a defect. The phased array detection unit (20) is used for scanning welded seams near the determined defect position by using a phased array ultrasonic detection method, identifying a defect of a size exceeding a preset size threshold, and locating the identified defect. Position information of a defect in a horizontal direction and a depth direction can be accurately determined by means of phased array ultrasonic detection; during location in cooperation with TOFD detection, a defect of a welded seam is accurately located by using TOFD scanning serving as a main method and phased array scanning serving as an auxiliary method, thereby overcoming the problems of poor locating precision of TOFD scanning and failure to detect a transverse defect during non-parallel scanning. |
