Automated tool for ultrasonic inspection of brazed joints

摘要

An ultrasonic inspection tool ( 100 ) for inspecting the brazed joint ( 76 ) between two generator stator coils ( 18 A and 18 B) and an interconnecting copper bar ( 74 ). The inspection tool ( 100 ) is automatically serially positioned at a plurality of inspection sites on the surface of the copper bar ( 74 ). At each site an ultrasonic signal is emitted from the tool ( 100 ) and the return echo is sensed. Analysis of the return echo at each of the plurality of sites determines the characteristics of the brazed joint ( 76 ) at the site, from which a determination can be made as to the quality of the joint between coils ( 18 A and 18 B) and the copper bar ( 74 ).