MAGNETOMETER AND DIELECTROMETER DETECTION OF SUBSURFACE OBJECTS

摘要

A detection apparatus discriminates between metallic mines and other buried objects by detecting the depth of the object, the size, the shape and the orientation of the object and the electrical properties of the object. A dielectric sensor having a first electrode and a second electrode is used in one embodiment. The first electrode is driven with a varying voltage to establish a varying electric field through the ground to the second electrode. The voltage magnitude and phase of the secon d electrode are measured. Another apparatus, a magnetometer sensor, detects objects containing metal located below the surface of the ground. This apparatus has a plurality of parallel, spaced linear conductor sets disposed in proximity to the ground. An electromagnetic field is imposed in the ground with a dominant spatial wavelength through the conductor elements. A resulting electromagnetic response of the object in the ground to the imposed magnetic field is sensed. The conductor sets may have varying number of individual conductors.