Self-adaption data acquisition system for mining ultrahigh density electrical method instrument

Abstract

The invention provides a self-adaption data acquisition system for a mining ultrahigh density electrical method instrument. The self-adaption data acquisition system for a mining ultrahigh density electrical method instrument is characterized in that an FPGA processor is electrically connected with a PC and an m sequencer; the m sequencer is electrically connected with a signal emission module; the signal emission module is electrically connected with a current measurement module; a signal processing module, the FPGA processor, the PC, the m sequencer, the signal emission module and the current measurement module are electrically connected with a system power supply; and the FPGA processor controls the m sequencer to generate a longest pseudo-random code binary sequence with high anti-interference capability so as to enable the width of the emission current to change randomly and enable positive and negative square wave signals to appear in the amplitude period. Therefore, the self-adaption data acquisition system for a mining ultrahigh density electrical method instrument overcomes the problems that a traditional high density electrical method instrument data acquisition system is low in the anti-interference capability, the measuring accuracy and the resolution and is not stable in the system performance, and can be preferably applied to detection underground coal mine to preferably guarantee safety of coal mining staff and reduce the financial loss of a coal mine enterprise.

Description

technical field [0001] The invention relates to the technical field of mine data acquisition, in particular to an adaptive data acquisition system for a mine ultra-high-density electrical instrument. Background technique [0002] Since the ultra-high-density electrical instrument adopts the method of running poles to collect the potential difference between electrodes, there are often two extreme situations. One is that when the measuring electrode is very close to the transmitting electrode, the potential difference of the measuring electrode may be very large. If the maximum input voltage of the A / D converter is exceeded, the light one will cause clipping phenomenon, and the severe one will burn out the A / D converter; another situation is that the measuring electrode is far away from the transmitting electrode, and the signal is very weak and cannot reach A Effective conversion range of / D converter. At present, the conventional high-density electrical instrument does not...

AI Technical Summary

Problems solved by technology

[0002] Since the ultra-high-density electrical instrument adopts the method of running poles to collect the potential difference between electrodes, there are often two extreme situations. One is that when the measuring electrode is very close to the transmitting electrode, the potential difference of the measuring electrode may be very large. If the maximum input voltage of the A / D converter is exceeded, the light one will cause clipping phenomenon, and the severe one will burn out the A / D converter; another situation is that the measuring electrode is far away from the transmitting electrode, and the signal is very weak and cannot reach A Effective conversion range of / D converter

At present, the conventional high-density electrical instrument does not have a good mechanism for processing high dynamic range data. The resolution of the instrument is low, and it has poor anti-interference ability for weak signals coming from deep underground mines. High-voltage cables around mines, electrical equipment for urban and rural residents etc. will cause a lot of interference, and its interference amplitude will be greater than the amplitude of the geoelectric signal. Conventional high-density electrical instruments often cannot handle these interference signals well.

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