Bipolar half-sine current generating device and method for full-ATEM (airborne transient electromagnetic system)

Abstract

The invention provides a bipolar half-sine current generating device and method for a full-ATEM (airborne transient electromagnetic system). The bipolar half-sine current generating device comprises a master control circuit, wherein a driving circuit is located between the master control circuit and an overshoot suppression circuit, connected with the master control circuit and the overshoot suppression circuit and used for generating an overshoot suppression temporal logic signal and providing a driving control signal for the overshoot suppression circuit; a trigger circuit is located between the master control circuit and an H inverter bridge, connected with the master control circuit and the H inverter bridge and used for generating a trigger control signal from an H-bridge inverting temporal logic signal; the H inverter bridge is connected with a power supply and used for outputting a bipolar square signal according to a constant-voltage signal of the power supply and the trigger control signal; the overshoot suppression circuit is connected with a series resonance circuit and used for supplying energy release access to oscillation waveform at the tail of current waveform contained in the series resonance circuit and eliminating the oscillation waveform at the tail of the current waveform; the series resonance circuit is connected with the H inverter bridge and used for generating bipolar half-sine current waveform meeting the current waveform requirement according to the bipolar square signal and eliminating oscillation at the tail of the current waveform by using the overshoot suppression circuit.

Description

technical field [0001] The invention belongs to the technical field of aeronautical transient electromagnetic exploration, and relates to a device and method for generating a bipolar half-sine current in an all-aviation transient electromagnetic system. Background technique [0002] The Aeronautical Transient Electromagnetic Exploration System (ATEM) is one of the important means of "deep-blind detection" in mineral exploration. With the help of the airborne platform, the ATEM system emits a pulsed magnetic field (primary field) underground through a multi-turn coil installed around the aircraft. , when there is an electrical difference in the underground ore body, an eddy current is generated under the excitation of the primary field, and radiates upward to the secondary magnetic field carrying the electrical information of the ore body, and the inductive vector magnetic sensor installed in the pod will detect the secondary magnetic field The secondary magnetic field is tra...

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Problems solved by technology

[0007] The above-mentioned prior art has the following technical defects: complex circuit implementation and high requirements for high-power devices; difficulty in realizing high-current output and high power consumption

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