Coal mine multimedia sound reinforcement communication terminal

Abstract

The invention provides a coal mine multi-media public address communication terminal which comprises an outer shell, a display screen, a camera, a microphone, a keyboard, a talk-listen button, a control button, a circuit board and a power amplifier horn. The outer shell is substantially a safety type outer shell. The display screen, the camera, the microphone, the keyboard, the talk-listen button and the control button are respectively fixedly installed on a panel of the outer shell. The circuit board is fixedly installed in a shell body of the outer shell. The power amplifier horn is fixedly installed in the shell body of the outer shell and faces towards two sides. A single chip microcomputer processing unit, a secure digital memory (SD) card, a network interface, and interfaces such as a video interface and a voice frequency interface are arranged on the circuit board. The single chip microcomputer processing unit is provided with a single chip. The display screen, the camera, the microphone, the power amplifier horn, the keyboard, the talk-listen button and the control button are respectively and electrically connected with the single chip through the corresponding interfaces in a signal mode. According to the coal mine multi-media public address communication terminal, the video and voice frequency communication between the outside and the inside of a coal mine is achieved. A management level of safety production of the coal mine is improved. The problem that an ordinary multi-media terminal is difficult to use in the environment inside the coal mine is overcome.

Description

technical field [0001] The invention relates to a voice-enhancing communication device used in coal mines. In particular, it relates to an intrinsically safe multimedia sound reinforcement communication terminal suitable for coal mines. Background technique [0002] Coal is the main energy source in our country, and the death rate per million tons of coal mine safety production has been included in the national economy assessment target system. Containing and reducing the occurrence of serious accidents in coal mines is a major problem that needs to be solved urgently. Coal mine underground communication and contact system is one of the "six major systems" for coal mine emergency avoidance, and plays a pivotal role in coal mine production management, safety decision-making, emergency rescue and disaster relief, etc. [0003] At present, there are two main types of mainstream technologies and products of coal mine communication system: one is based on analog telephone syste...

AI Technical Summary

Problems solved by technology

Its shortcomings are: poor real-time performance, poor sound quality and low volume of transmitted voice signals, complex wiring, single control mode and difficult expansion; the other type is a network-based digital broadcasting system, and the digital voice communication system has a long transmission distance. It has strong anti-interference ability and can easily realize the fine control of the time, object and content of the broadcast intercom system. However, the current underground network digital broadcast system requires high power consumption due to broadcasting, and the underground coal mine has a high demand for electrical equipment. Safety requirements will inevitably limit the power consumption of the system, so that the existing broadcast terminals have to use low-performance MP3 voice codec core and non-standard control protocol. Protocol's Multimedia Service Integration Function

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