G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/10 (2006.01)
Patent
CA 2626339
The invention is concerned with electromagnetic exploration of the earth's surface. In a method proposed by the invention, a primary coil is powered to generate a primary field and the primary field is applied to the earth and a receiver, used to detect a secondary field generated by the earth in response to the primary field, is moved over the surface of the earth. According to the invention, Helmholtz coils (14.1, 14.2) are arranged in a predetermined array and are powered in such a manner that they generate, in a volume accommodating the receiver, a magnetic field which serves at least partially to null the magnetic field of the earth. The invention also provides apparatus for carrying out the method.
L~invention concerne la prospection électromagnétique de la surface de la Terre. Selon un procédé de l~invention, une bobine primaire est parcourue d~un courant pour générer un champ primaire et le champ primaire est appliqué à la Terre. Un récepteur, utilisé pour détecter un champ secondaire généré par la Terre en réaction au champ primaire, est déplacé sur la surface de la Terre. Selon l~invention, des bobines de Helmholtz (14.1, 14.2) sont disposées dans une configuration prédéterminée et parcourues d~un courant pour générer, dans un espace contenant le récepteur, un champ magnétique servant au moins partiellement à neutraliser le champ magnétique de la Terre. L~invention concerne également un appareil permettant de mettre en AEuvre le procédé.
Anglo Operations Limited
Sim & Mcburney
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