Intrinsically safe network voice controller for mining

Abstract

The invention discloses an intrinsically safe network voice controller for mining, comprising a CPU (central processing unit) circuit, wherein the CPU circuit is respectively connected with a network processing circuit, an SD (Secure Digital Memory) card circuit, two paths of audio coding and decoding circuits, an audio drive circuit and a power supply circuit for supplying power, the two paths of audio coding and decoding circuits are connected with at least one path of audio interfaces through the audio drive circuit, and the SD card circuit is directly connected with the audio coding and decoding circuits. The intrinsically safe network voice controller for mining, disclosed by the invention, is a part of underground digital broadcast of a coal mine, the digital broadcast is transmitted by a network, so that the signal to noise ratio is high, the transmission distance is far, and the digital broadcast has an advantage incomparable to that of the traditional constant pressure broadcast method. The intrinsically safe network voice controller for mining is suitable for such occasions as an underground sidewalk of mine, a parking place and a rest room, etc.

Description

[0001] technical field [0002] The invention relates to a mine-used intrinsically safe network voice controller. Background technique [0003] At present, traditional broadcasting cannot meet the needs of underground broadcasting in coal mines. The traditional ①constant voltage transmission is affected by factors such as the bandwidth of the transformer between the lines, the size of the speaker, and the diameter of the cable. Only one set of programs can be transmitted, which cannot satisfy simultaneous broadcasting and regional broadcasting, and cannot realize point-to-point addressing broadcasting. ③The sound source is basically an analog sound source, which cannot play digital format audio files, and cannot realize automatic playback and automatic control. Constant-voltage broadcasting is designed according to the principles of power matching and impedance matching. Once the system wiring is installed, the capacity for power expansion is very limited, and the program ...

AI Technical Summary

Problems solved by technology

[0003] At present, traditional broadcasting cannot meet the needs of underground broadcasting in coal mines

The traditional ①constant voltage transmission is affected by factors such as the bandwidth of the transformer between the lines, the size of the speaker, and the diameter of the cable. Only one set of programs can be transmitted, unable to satisfy simultaneous broadcasting and regional broadcasting, and unable to realize point-to-point addressing broadcasting

③The sound source is basically an analog sound source, which cannot play digital format audio files, and cannot realize automatic playback and automatic control

Constant-voltage broadcasting is designed according to the principles of power matching and impedance matching. Once the system wiring installation is completed, the capacity of power expansion is very limited, and the program capacity cannot be expanded.

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