| 摘要 |
<p>PURPOSE:To easily detect information on an underground buried body by a detector on the ground by providing a spiral conductor on one surface or both surfaces of an insulated thin body and connecting the conductor to a chip type capacitor. CONSTITUTION:The spiral body (e.g. copper or aluminum) and the capacitor 2 are connected by connection wires 6 and 7 and arranged on the insulating thin body (synthetic resin or rubber) 3, and they are covered (color lay film sheet or resist) 4 for water-proofing. Many units are adhered and arranged lengthwise successively on a sheet type body (polyethylene resin or polypropylene resin) 5, and used. The spiral body 1 is a resonance circuit and provides inductance L. When electromagnetic wave oscillation from a detector is stopped, the resonance frequency f0 of an electromagnetic wave oscillated by the spiral body 1 is f0=1/(2pi(LC)<1/2>). Namely, the inductance L found from the expression and the capacity C of the capacitor 2 can be selected.</p> |
