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| | Abstract | | The examination aimed to compare of the performances of various detectors to the thing of laying underground such as cannonballs. The examination was executed while had hanged to 1.5m on the ground trench mortar and the maneuver bullet and laid under the ground. As a result of the pendency examination, the detection distance of a metallic detector to 81mm trench mortar was about 1m. The magnetic anomaly that the direction of the length axis of the object was near direction of the earth magnetic field was the strongest from the field examination with three axis differential fluxgate magnetometer. And, it turned out for the stratum boundary hidden under the ground might appear as obvious anomaly. |
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