| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a detecting apparatus wherein, when the apparatus is collectively attached to a metal body like a metal tube, a resonance frequency and a Q value of a coil are not changed, the metal body can be accurately detected, and possibility that a detecting element is damaged or moved scarcely exist when work for digging out objects except the metal body. SOLUTION: A detecting element 10 of a buried object is buried in the ground together with a metal body 20, and equipped with magnetic material 11 turning to a magnetic core, an antenna coil 12 wound around the magnetic material, and a capacitor 13 which is connected with both ends of the antenna coil and forms a resonance circuit together with the antenna coil 12. The outer peripheral surface of the antenna coil 12 faces the outer peripheral surface of the metal body 20 interposing electromagnetic shielding material 14, and collectively fixed in an unified body with the metal body 20.</p> |
