| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To rapidly and accurately detect a three dimensional position of an underground buried object. <P>SOLUTION: Three sets of pairs of transmitting-receiving antenna elements 1a, 1b; 1c1, 1c2; 1d1, 1d2 are arranged in a plurality of partial storage spaces formed in a conductive antenna housing 2. In the antenna elements, pairs of conductors 5a, 5b, 5cl, 5c2, 5d1, 5d2, 6a, 6b, 6c1, 6c2, 6d1, 6d2 are arranged in a straight line, and a dipole antenna is formed. The conductor has a length ofλ/2 when a wavelength isλ, and the pair of the antenna elements 1a and 1b is arranged to be shifted byλ/2 in a longitudinal direction of the conductors from the sets of the antenna elements 1cl, 1c2; 1d1, 1d2. A distance of the underground buried object, that is, the position thereof can be detected based on the time difference between a pulse-like transmitting signal applied to the sets of the transmitting antenna elements 1a, 1c1, 1d1 and a receiving signal obtained from the sets of the receiving antenna elements 1b, 1c2, 1d2. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
