Arborescence remote communication bus system

Abstract

The invention discloses an arborescence remote communication bus system which comprises an above-well communication system and an under-well communication system, wherein an above-well single chip microcomputer is connected with a communication call receiving driving circuit through an above-well communication chip; the under-well communication system comprises a signal receiving circuit and a signal answer circuit; an under-well communication chip is connected with the signal answer circuit; a phase detection control circuit is connected between the signal receiving circuit and the under-well communication chip and is connected with the under-well communication chip through a communication clock; the communication call receiving driving circuit is connected with the signal receiving circuit and the signal answer circuit and can realize information transmission; the under-well single chip microcomputer is also connected with and controls an output circuit and a display circuit. By adoption of the structure, the arborescence remote communication bus system can realize long-distance communication transmission and random arborescence connection; network topology can be expanded without an active node; furthermore, each transmission unit does not need to be coordinated with cable impedance and is not connected by being aligned with the polarity; common-mode interference resistant and relay-free long-distance driving can be realized.

Description

[0001] technical field [0002] The invention relates to a network communication bus system for underground coal mines, in particular to a tree remote communication bus system. Background technique [0003] The network communication bus technology is widely used, and its main disadvantage is that the communication distance is short and usually does not exceed 10M. Although there is a speed-adaptive long-distance bus, it is point-to-point communication and cannot be connected in any tree. The network topology must rely on active node expansion, and every The cable impedance of a transmission unit must be matched, otherwise serious signal reflections will occur and cause bit errors, which is too harsh for the application conditions of underground coal mines; there is no long-distance drive bus without repeaters in the prior art, so it restricts the communication of underground mines develop. Contents of the invention [0004] The technical problem to be solved by the pr...

AI Technical Summary

Problems solved by technology

[0003] The network communication bus technology is widely used, and its main disadvantage is that the communication distance is short and usually does not exceed 10M. Although there is a speed-adaptive long-distance bus, it is point-to-point communication and cannot be connected in any tree. The network topology must rely on active node expansion, and every The cable impedance of a transmission unit must be matched, otherwise serious signal reflections will occur and cause bit errors, which is too harsh for the application conditions of underground coal mines; there is no long-distance drive bus without repeaters in the prior art, so it restricts the communication of underground mines develop

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