A Coal Mine Personnel Positioning System Based on Visible Light Communication

Abstract

The invention discloses a coal mine worker positioning system based on visible light communication. The system comprises multiple mobile reception modules and multiple distributed central control modules, wherein the multiple central control modules are simultaneously connected with illumination power supply cables and mining communication cables in mine tunnels, each central control module is equipped with multiple first detectors and two LED mine lamps, the two LED mine lamps employ a back-to-back mounting mode, edge light of the two LED mine lamps is in a vertical direction, and each mobile reception module is equipped with a second detector and an LED head lamp and is carried by a coal mine worker. According to the system, the mine lamps are simultaneously connected with the illumination power supply cables and the mining communication cables, through an LED light loading signal mode, information of a distance from a worker to a certain mine lamp can be figured out by utilizing a time measurement scheme, worker position positioning can be realized, precision reaches 1-2 meters, and the system further has advantages of energy-saving and environment-friendliness performance, real-time communication and maximized non-blind area.

Description

technical field [0001] The invention relates to the technical field of visible light communication, in particular to a coal mine personnel positioning system based on visible light communication. Background technique [0002] According to the regulations of the State Administration of Work Safety, the mine communication system is one of the necessary installation systems in the coal mine working environment, which is related to coal mine safety production, emergency avoidance and emergency rescue. Therefore, it is very necessary to develop a safe, energy-saving, stable and reliable communication system, and a communication system that can track the geographic location information of mine personnel is of great significance. [0003] The wireless communication technologies commonly used in the mine environment mainly include radio frequency identification technology (RFID), ultra-wideband technology (UWB), wireless local area network technology (WLAN) and visible light communi...

AI Technical Summary

Problems solved by technology

The highest accuracy of RFID reaches 2-3m, and its disadvantages are poor stability, signal omission, and short transmission distance; the highest accuracy of UWB reaches half a meter, and its disadvantages are high complexity and high cost; the highest accuracy of WLAN reaches 1-2m, and its high complexity

The biggest disadvantage of the above three technologies is that it is necessary to re-layout the communication lines under the mine, which has low operability, high overall cost and large blind area.

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