| 摘要 |
Two transducers to be rotated around a circumferential location on a cylindrical body for structural testing of the body are carried on a mountin g and drive apparatus including a magnetic attachment which can be manually brought up t o a pipe from one side only for fixed connection to the pipe on that side at a position axially spaced from a weld. A collar shaped support for the pair of transducers is formed of a row of separate segments which wrap around the pipe from the one side and is rotated around the axis of the pipe to carry the transducer around th e circumferential weld. The segments carry rollers to roll on the surface and are held against the pipe by magnets. The transducers are carried on the support in fixed angular position to track their position but in a manner which allows slight axial or radial movement relative to the pipe.
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