| 摘要 |
<p>PURPOSE:To detect an article buried underground, which is irrespective of a magnetic or nonmagnetic one, without digging up. CONSTITUTION:A sheet 10 to be detected incorporating a band-like flexible magnet which is unidirectionally magnetized, is buried in the vicinity of an underground buried article 14, and is detected by a magnetic detector 32 on the ground. Accordingly, the underground buried article can be detected conveniently at a low cost on the ground without digging up its. Further, this method does not limit the material of the underground buried article to a specific one, and accordingly, is variously usable.</p> |
