Mining explosion-proof and intrinsically safe multimedia computer

Abstract

The invention discloses a mining explosion-proof and intrinsically safe multimedia computer which comprises an explosion-proof case, a cover board, a keyboard turnover device and a computer control circuit, wherein the computer control circuit comprises an industrial control board, a signal control module, a signal isolation module and a universal serial bus (USB) signal conversion module; an explosion-proof chamber is formed between the explosion-proof case and the cover board, and the computer control circuit is arranged inside the explosion-proof chamber. The mining explosion-proof and intrinsically safe multimedia computer is characterized in that a window is arranged on the cover board; a display screen is arranged inside the explosion-proof chamber; the display screen is right opposite to the window of the cover board; toughened glass is arranged outside the display screen; the toughened glass is fixed on the inner surface of the cover board; a keyboard is embedded on the keyboard turnover device; the keyboard turnover device is hinged with the cover board through a hinge mechanism; the industrial control board outputs a USB signal, an RS232 signal and an RS485 signal to the signal isolation module; the industrial control board receives the USB signal, the RS232 signal and the RS485 signal output by the signal isolation module, and outputs the signals to the display screen to display after the signals are processed. The mining explosion-proof and intrinsically safe multimedia computer disclosed by the invention can be widely applied to coal mine monitoring.

Description

technical field [0001] The invention relates to a multimedia computer used in coal mines and non-coal mines, in particular to a mine explosion-proof and intrinsically safe multimedia computer. Background technique [0002] Among mine explosion-proof computers, it is common to use explosion-proof and intrinsically safe computers for mine monitoring systems to realize underground data processing and display. Underground substations communicate with underground substations and other equipment through RS485, CAN, Ethernet and other communication interfaces. However, in terms of communication function and power supply mode, it does not have the function of communicating with the MWD measurement system of the kilometer directional drilling rig, and needs a separate power distribution power box for power supply; in the mine remote horizontal drilling rig control system and the mine explosion-proof The computer does not have sound input and output functions; it does not have the fun...

AI Technical Summary

Problems solved by technology

However, in terms of communication function and power supply mode, it does not have the function of communicating with the MWD measurement system of the kilometer directional drilling rig, and needs a separate power distribution power box for power supply; in the mine remote horizontal drilling rig control system and the mine explosion-proof The computer does not have sound input and output functions; it does not have the functions of image, data and sound processing and isolation of input and output signals. In terms of signal isolation methods, Ethernet signal isolation mostly uses optical fiber conversion, or directly uses magnetic isolation, resulting in a large explosion-proof chamber volume. Larger, the RS232 signal is converted into an RS485 signal for isolation, and the sound is mostly isolated by a voice conversion circuit; the existing explosion-proof computers for mines mostly use LCD or LED screens, all of which require inverters, and high voltage poses safety hazards in mines

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