| 摘要 |
PURPOSE:To detect a buried object with a high accuracy even if plural buried objects are positioned adjacently to each other and also a water lump, etc. are interposed, by detecting a rough position of the buried object, and its detailed position, etc. by one of sensors having two kinds of transmitting and receiving signal forms, and the other, respectively. CONSTITUTION:A rough horizontal position of buried pipes 25, 26, etc. is detected irrespective of a water lump, etc. by a magnetic sensor loaded together with a radar use antenna 23 on an automatic running device 20. Subsequently, when said device is switched to a mode by the antenna 23 by a switching device 32, a detailed position, a depth and a size of the pipes 25, 26 is detected with a high resolution by the antenna 23 and a transmitter and receiver 29. By using jointly said two kinds of sensors whose transmitting and receiving signal form is different from each other, an underground buried object can be detected with a high accuracy even if plural buried objects are positioned adjacently to each other, and also a water lump, etc. are interposed. |
