A mine-used dynamic directional electric field excitation method coal roadway full-mechanized excavation advanced detection and launch system

Abstract

The invention discloses a mine-used dynamic directional electric field excitation method coal roadway full-mechanized excavation advanced detection and launch system, which is composed of a microprocessor, a signal generation circuit based on DDS, an isolation drive circuit, an inverter circuit based on IPM, and a steady-current power supply and related peripheral circuits. The DDS chip is controlled by the microprocessor to generate the inverter drive signal of the launch system, and the IPM-based inverter circuit is driven by the isolated drive circuit to output up to five channels of stable and controllable modulated square waves, and the same phase of each output is guaranteed. The same polarity; the five outputs are divided into one emission output and four constraint outputs. The electric field output by the emission electrode is constrained by using the same-sex repulsion property of the electric field, so as to control the propagation direction of the electric field and achieve half-space scanning in front of the tunneling face. The internal circuit design of the present invention conforms to the technical specifications and requirements of coal mine safety production, has good output waveform stability, high frequency resolution, self-protection function, and convenient and fast operation.

Description

technical field [0001] The invention relates to an advanced detection instrument for coal mine underground operations in the field of advanced detection, which belongs to the advanced detection technology of applying geophysics electric method, in particular to an advanced detection and launching system for fully mechanized excavation of coal roadway with dynamic directional electric field excitation method. Background technique [0002] "Forecasting and forecasting, all digging must be explored, first explored and then excavated, first treated and then mined" is the principle that must be adhered to in the production process of coal mines. Gas explosions in coal seams, rock collapse, water inrush and other geological disasters have a high incidence and are highly accidental, posing a great threat to the life safety of tunneling miners, and frequent casualties during tunneling. Among the five major disasters in coal mines (gas, flood, fire, dust, and dynamic geological disas...

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Problems solved by technology

However, the transmitter only uses a microcontroller to control the driving timing of the IPM, and the accuracy of its output frequency is not high, and there is only one transmission output, which cannot realize the control of the constrained electric field, so that the electric field can achieve a dynamic deflection effect and reach the front of the excavation working face. half-space scan

In addition, the patented product did not take into account the explosion-proof problem when it was developed, so it cannot be used in the environment containing coal dust in coal mines

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