| 摘要 |
An ROV-operated assembly 1 includes a probe 11 provided with a probe tip 1111 arranged to penetrate a protective layer (31, Fig 5) on a metallic object (3, Fig 5). A hammer unit 14 is arranged to impart an axial motion to the probe tip where the axial motion is a reciprocating one induced by the rotation of an input driveshaft in the hammer unit. The motion may be generated by rotating a rotor with a corrugated face which rests against a complementary face of an axially displaceable non-rotatable rod connected to the probe tip. An alternative arrangement provides the rotor with a jacket having a continuous groove and a corresponding guiding element on the non-rotatable rod. The probe can be used to measure the cathodic potential of a coated metal surface by piercing the coating. |
