| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a buried object surveying antenna capable of indicating a surveyed image superior in discrimination of small reflection wave from the buried object. SOLUTION: In a buried object surveying device surveying a buried object by emitting electromagnetic wave into a structure or the ground and receiving the reflection wave from the structure or the buried object in the ground, the shape of the transmission antenna T has a shape symmetric to the center line in the longitudinal direction and a plurality of reception antennas R1 and R2 of the same shape are placed so as to be symmetrical against the center line of the transmission antenna T to constitute a transmission/reception antenna. The signal received with each of the reception antennas R1 and R2 is passed through an in-phase noise elimination choke and signal obtained with a transformer differentiating or adding each signal is made a survey reception signal.</p> |
