Method and device for locating and identifying search objects co

Details Method and device for locating and identifying search objects co Method and device for locating and identifying search objects co

1997-11-24

2000-08-01

Patidar, Jay

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

G01V 311, G01V 3165

Patent

active

060971908

ABSTRACT:
A method for locating and identifying search objects concealed in the gro under a ground surface is described. Preferred search objects are plastic mines, which inter alia contain a plastic body and at least one metallic part, particularly an igniter. Firstly the position of the metallic part is established, preferably with an eddy current probe. Then a search area surrounding the part is investigated by means of a ground probe, which produces a ground signal indicating the presence of ground material. The ground signal is evaluated in position discriminating manner. Preferably the ground probe and metal probe are identical, which is e.g. made possible by an operation of the eddy current probe with at least three different frequencies and a suitable signal evaluation. Prior to the investigation of the search area the electrical conductivity and/or magnetizability of the ground can be increased by impregnating with a liquid, which can contain salt water and/or magnetizable particles. A portable mine searching device is also described, in which at the lower end of a supporting rod is located a probe carrier casing, within which the eddy current search coil system is guided in reciprocating manner.

REFERENCES:
patent: 4563644 (1986-01-01), Lenander et al.
patent: 4719426 (1988-01-01), Weiss
patent: 5307272 (1994-04-01), Butler et al.
patent: 5452639 (1995-09-01), Aulenbacher et al.
patent: 5680048 (1997-10-01), Wollny
patent: 5719500 (1998-02-01), Eschner et al.

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