| 摘要 |
<p>PURPOSE:To easily execute a detecting operation, and to exactly detect only a buried object under the ground, etc., by removing a signal portion which is generated in case when a vessel for storing and fixing an antenna part has come not to be parallel to the surface to be detected. CONSTITUTION:This detector is provided with a signal generation part (a), an antenna part (b) having a transmission antenna 22o and receiving antennas 22a.22b, an antanna rotation driving part (c), a signal processing part (d) consisting of detecting and amplifying circuits 24a.24b of each receiving signal, BPFs 25a.25b for stopping only a frequency component corresponding to a rotary period of the antenna part, a differential circuit 26 for taking a difference of outputs of each BPF, and a rectifying circuit 27 for taking out only a positive signal portion, and a display part (e). In this way, it is possible to remove a signal portion which is generated in case when a vessel A for storing and fixing the antenna part (c) has come not to be parallel to the surface to be detected 40.</p> |
