Transient electromagnetic instrument for mine and transient electromagnetic signal processing method

Abstract

The invention discloses a transient electromagnetic instrument for mine and a transient electromagnetic signal processing method. The method comprises the following steps that: (a), a real-time transmitting module transmits two types of electromagnetic waves in interval period, namely mining electromagnetic waves and empty-mining electromagnetic waves; (b), a real-time acquisition module receives two electromagnetic wave signals emitted in interval period in real time and transmits the electromagnetic wave signals to a complex programmable logic controller device; and (c), the complex programmable logic controller device transmits the electromagnetic wave signals to a microprocessor for processing through an internal control bus, and the microprocessor performs difference operation on the two received electromagnetic wave signals and obtains an operation result. A 32-bit high-end embedded microprocessor communicates with the complex programmable logic controller device through a cable, when the electromagnetic waves are transmitted, the two types of mining electromagnetic waves and empty-mining electromagnetic waves are transmitted in interval period, the two types of electromagnetic waves which are acquired in real time are transmitted to the microprocessor to perform difference operation, and the acquired data of which the interference is filtered is seamlessly acquired under the conditions of high-speed acquisition and high-speed operation processing.

Description

technical field [0001] The invention relates to the field of mine geological detection instruments, in particular to a mine transient electromagnetic instrument and a transient electromagnetic signal processing method. Background technique [0002] Transient electromagnetic method is also called time domain electromagnetic methods (TEM), which uses ungrounded return line or grounded line source to transmit a pulsed magnetic field underground, and uses coils to observe the secondary eddy current during the intermittent period of the pulsed magnetic field. field method. Its basic working method is: set a transmitting coil on the ground or in the air with a certain waveform current, so as to generate an electromagnetic field in the surrounding space, and generate an induced current in the underground conductive rock ore body: after the power is cut off, the induced current is lost due to heat loss. And decay over time. The decay process is generally divided into early, middle...

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Problems solved by technology

However, this solution directly uses the MCU to control and process the transmitting and receiving signals, the acquisition rate is not high, and the collected random interference signals are not effectively processed, and when the interference is severe, it deviates from the normal value

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