Underground embedding tube inquiry device and underground embedding tube inquiry manner

摘要

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.;COPYRIGHT: (C)1993,JPO&Japio