| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an induction pick-up hardly affected by a disturbance magnetic field resulting from a current conduction rod arranged closely adjacently. SOLUTION: This pick-up is provided with a ring-shaped coil 10 for partitioning a passage for a conductor. The coil 10 is uniformly extended ranging over almost all the periphery of a ring, except for a section 20 where the coil 10 has a structural connection and disconnection part. The coil 10 is also provided with at least one supplementary coil 12. The coils 10, 12 are arranged coaxially, and the structural connection and disconnection parts thereof are directed to be regularly distributed in their angular positions around a common axis of the coils 10, 12. The coils 10, 12 are connected in series.</p> |
