An aeronautical transient electromagnetic method receiving compensation device

Abstract

The application relates to an aeronautical transient electromagnetic method receiving compensation device. The airborne transient electromagnetic method receiving compensation device of the present application includes: a receiving coil, a transmitting coil, a compensating coil and at least one compensating magnetic core, the transmitting coil is arranged on the periphery of the receiving coil, and the compensating magnetic core is arranged on the transmitting coil, so The compensation coil is arranged on the compensation core. By adding compensation to the receiving coil of the aviation transient electromagnetic method receiving compensation device of the present application, its debugging is more flexible, the assembly is more convenient, and the suppression is more thorough; in addition, the proposed receiving compensation coil will not weaken the energy injected into the earth by the primary field, and will not It will weaken the secondary field signal, and will not affect its detection ability. Since the primary field can be fully compensated, a cleaner secondary field signal can be obtained, and the detection depth and resolution are greatly improved.

Description

technical field [0001] The application belongs to the technical field of polymetallic ore detection, and in particular relates to a receiving and compensating device for aerial transient electromagnetic method. Background technique [0002] The airborne transient electromagnetic method is a polymetallic ore detection method commonly used in the world in recent years. It has the advantages of fast speed, high efficiency, large exploration depth, high resolution, and small terrain influence. It is especially suitable for shallow coverage areas where work is difficult. [0003] The positional relationship between the transmitting coil and the receiving coil of the existing airborne transient electromagnetic method is as follows: figure 1 shown. The transceiver coil is on a horizontal plane, and its shape and position are usually close to two concentric circles. The transmitting coil has a radius of about 25 meters and has 3-6 turns, and the receiving coil has a radius of abou...

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Problems solved by technology

[0004] The shortcoming of the existing airborne transient electromagnetic method receiving compensation method is that the transmitting compensation coil can greatly suppress the primary field induction signal, but since the position of the compensation coil is crucial to the compensation effect, in actual implementation, it is difficult to obtain and theoretical The effect of suppression, for example, the transmitting coil usually uses a polygon to approximate a circle, and the compensation coil is difficult to adjust to the ideal position, which leads to the problem of under-compensation or over-compensation of the receiving magnetic field. Under-compensation and over-compensation cannot obtain a truly ideal measurement signal; In addition, the launch compensation coil also weakens the energy injected into the earth by the primary field, reduces the intensity of the secondary field, and loses the ability to detect the effect

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