| 摘要 |
<p>A detector (100) for finding metal objects being disposed in garbage includes a driving coil, a receiving coil corresponding to an antenna element (120), and a voltage detector. The driving coil encircles an opening formed in a ring-like lid (102) for the trashcan. The controller connects to the driving coil and oscillates a driving current in the driving coil. A receiving coil is disposed parallel to the driving coil and has a current induced therein from the driving current in the driving coil. The voltage detector connects to the coil and detects changes in voltage of the inducted current when a metal object passes through the driving coil and the receiving coil. The coils can be constructed from a flat ribbon coil containing a plurality of parallel wires. The flat ribbon coil can be supported under a trashcan lid by a support. <IMAGE></p> |
