Working face ultra-long distance communication module

Abstract

In order to solve the problem of ultra-long distance communication between an underground coal mine working face and a ground background, the invention discloses a working face ultra-long distance communication module. The module is composed of a power line carrier module, a near field communication module, a large-capacity storage module and a communication control module. The communication control module selects a proper carrier communication rate according to the distance of a power supply line, communicates with various working equipment of a working face by adopting communication modes such as RS485, CAN and Ethernet, calculates the bit error rate in real time, dynamically adjusts the carrier communication rate according to the communication bit error rate, adopts high-capacity cache and sets verification, and communicates with the working face equipment after a complete message is received, so the communication problem of the working face remote working equipment and the upper computer is solved.

Description

technical field [0001] The invention relates to the technical field of power system communication, in particular to an ultra-long-distance communication module for a working surface. Background technique [0002] With the increasing power of coal mining units in the fully mechanized mining face of coal mines, many coal mines adopt the coal mining method of the mining face. Considering manpower and material resources, it will be uneconomical to build a substation at the working face, which will cause serious damage to the working face. The demand for ultra-long-distance is also continuously increasing, but with the increase of power supply distance, if the quality of power supply, the safety, reliability and economy of power supply cannot be guaranteed, the machinery on the working face will not be able to operate normally due to the difficulty of starting the motor, and the motor will also be damaged due to terminal failure. If the voltage is too low, it will heat up and bur...

AI Technical Summary

Problems solved by technology

[0002] With the increasing power of coal mining units in the fully mechanized mining face of coal mines, many coal mines adopt the coal mining method of the mining face. Considering manpower and material resources, it will be uneconomical to build a substation at the working face, which will cause serious damage to the working face. The demand for ultra-long-distance is also continuously increasing, but with the increase of power supply distance, if the quality of power supply, the safety, reliability and economy of power supply cannot be guaranteed, the machinery on the working face will not be able to operate normally due to the difficulty of starting the motor, and the motor will also be damaged due to terminal failure. If the voltage is too low, it will heat up and burn out, so the gain outweighs the loss

Therefore, it is necessary to study the ultra-long-distance technology of the underground working face. This ultra-long-distance communication module is installed in the working equipment of the working face, aiming at solving the problem of long-distance communication of the working equipment of the working face. The most suitable communication medium for long-distance communication is Optical fiber, but the mining face is far away from the main roadway, there is no fiber optic network that has been laid, the optical fiber is difficult to erect in the mining roadway and is easy to break, and it is difficult to recover the optical fiber during mining, so it is not feasible to use optical fiber communication. RS485 , CAN and other serial communication methods, theoretically, when the communication rate is 100Kbps and below, the longest transmission distance can reach 1.2 kilometers, but in practical applications, the transmission distance varies due to the transmission characteristics of chips and cables, and it is actually difficult to achieve The theoretical maximum transmission distance is even more impossible to achieve 3 km ultra-long-distance communication, so there is an urgent need to develop reliable and low-cost long-distance communication technology

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