| 摘要 |
<p>PURPOSE:To obtain a title apparatus which is not disturbed by objects other than a target buried pipe, not interfered by external noises, and which can confirm the position of an underground buried pipe with ease and high precision- sensitivity and causes no public nuisance. CONSTITUTION:A superconductivity cooling means 1 stores a superconducting inductance circuit C. This circuit C consists of a first auxiliary coil L1, a second auxiliary coil L2 which has almost the same inductance as that of the first auxiliary coil L1 and is connected almost linearly and in series in a reverse winding direction at a predetermined interval (t), and a detection coil L3 series- connected with the second auxiliary coil L2, and a magnetic flux detector 10 is provided in a vicinity of a detection coil L3.</p> |
