Underground intercom system

A technology of intercom system and conversion unit, which is applied in the field of communication, can solve problems affecting communication quality and transmission distance, and achieve the effects of lighting and communication, high response sensitivity, and good modulation performance

Inactive Publication Date: 2018-03-30
重庆市万盛区杜宇机电有限责任公司
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  • Abstract
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Problems solved by technology

In addition, mining equipment and exhaust facilities are placed under the mine, and a large number of barbed wires are distributed on and around the

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  • Underground intercom system
  • Underground intercom system
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Example Embodiment

[0019] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.

[0020] It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic way, so the drawings only show the components related to the present invention rather than the number, shape and number of compo...

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Abstract

The invention provides an underground intercom system, which includes a voice input unit, an amplification unit, an AD conversion unit, a coding unit, a lighting modulation circuit, a lighting unit, an optical concentrator, a photoelectric detector, an amplifier, a decoding unit, a DA conversion unit, a power Amplifying unit and voice output unit. The transmitter sends the collected analog audio signal to the control unit for amplification, AD conversion and Manchester encoding, and the digital signal is loaded to the lighting modulation drive circuit. The optical concentrator converges the optical signal to the photosensitive surface of the photodetector, the optical signal is converted into an electrical signal, and regenerated into the original Manchester coded signal, and then the signal is decoded and DA converted by the control unit. Finally, the signal is amplified and loaded onto the small speaker to restore the voice signal. The invention utilizes the outstanding advantages of high LED response sensitivity and good modulation performance to realize visible light wireless communication of LED miner's lights, and the background conditions of underground darkness and low reflection intensity are conducive to the transmission of visible light, and can realize both lighting and communication.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an underground intercom system. Background technique [0002] In recent years, there has been underground short-range wireless voice communication using Bluetooth technology, but Bluetooth devices have disadvantages such as high power consumption, short communication distance, and easy interference. Other short-range wireless communication technologies include UWB (ultra-wideband) technology, ZigBee (wireless sensor) technology, and the like. These technologies all belong to radio frequency wireless communication, which have disadvantages such as high cost, difficult installation and high power consumption. In addition, the underground communication environment is harsh, and a large amount of coal mine dust, combustible gas and water vapor contained in the air will absorb radio waves, and the radio waves in the narrow roadway space are easily absorbed and reflected by rock...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04B10/114
CPCH04B10/116H04B10/1143
Inventor 杜宇仁
Owner 重庆市万盛区杜宇机电有限责任公司
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