| 摘要 |
PURPOSE:To obtain information only in a weld zone during a test of electric resistance and to improve fault detection precision by forming movably a detection part. CONSTITUTION:This nondestructive inspecting device is equipped with feeding stylii 7 and 7' arranged between materials 1 and 2 to be welded, a constant current source connected to those feeding stylii, detection parts 8 and 8' arranged at a weld zone 3, and a voltage detecting circuit 15 connected to each detecting stylus; and a decision on the presence of a welding fault is made on the basis of voltage values obtained by the detecting stylii 8 and 8'. In this case, a scale 12 is provided facing the detecting stylii 8 and 8', which are provided integrally througn a supporting member; and a pointer 13 is fixed to the supporting member and the detecting stylii 8 and 8' are movable along the scale 12. |
