A distributed electromagnetic transmitter system and control method

Abstract

The invention discloses a distributed type electromagnetic transmitter system and a control method therefor. The system comprises a multi-power-source module, a multi-emission module and an optional control module, wherein a plurality of AC / DC converters are connected in parallel via the multi-power-source module, and therefore multiple 380V alternating current to direct current conversions can be realized; the multi-power-source module is enabled to have a voltage adjusting function; the multi-emission module is used for selectively transmitting a plurality of direct current voltage signals obtained via converting operation to a plurality of emission sub-module, and a distribution type emission function can be fulfilled; main control logic of the control module is realized via an FPGA, and data communication between a transmitter and computer software can be realized via an MCU. Transmitter power capacity can be flexibly configured via the system and the method, and high frequency emission current peak value can be effectively improved.

Description

technical field [0001] The invention relates to a distributed electromagnetic transmitter system and a control method, and further relates to the application of the system and method for electromagnetic prospecting. Background technique [0002] For the layout of the emission source of the artificial source electromagnetic method, two ground electrodes will be arranged at a certain position according to the work task in the area to be detected. The distance between the two ground electrodes is generally 1Km-3Km. The junction is connected to the transmitter, and the transmitter and the generator are connected by wires. [0003] CN103308950A discloses a multifunctional electromagnetic transmitter, including a system control unit, a waveform synthesis and protection unit, a power drive circuit, an H bridge circuit, a transmitting unit, a display unit, a synchronization module and a storage unit, and the system control unit contains a microcontroller , the waveform synthesis an...

AI Technical Summary

Problems solved by technology

[0014] 1) It will increase the rise time of the current and distort the emission waveform;

[0015] 2) When transmitting high-frequency current, due to the existence of parasitic inductance, the overall transmitter load impedance becomes larger, and the peak value of the transmitting current decreases, which affects the detection depth

[0016] In summary, due to the influence of the inductive part on the line or in the load, the equivalent impedance will increase, the effective value of the current will decrease, and finally the power transmitted by the transmitter will decrease.

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